This is a seminar on research that takes place every Tuesday at 9am (US Central Time). Slides of the talks are posted in advance here. Talks are recorded and the audio posted here. Among the groups that participate live are PennState, Perimeter Institute, Marseille, AEI-Potsdam, Utrecht, UNAM-Mexico, FUW-Poland, CSIC-Madrid, UDELAR, Uruguay, UWO-Canada, UNB-Canada, Umass Dartmouth, Hamilton College, IISER Kolkata-India, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Florida Atlantic University, University of Minho, Bard College, Wroclaw University, Yor k University and LSU. If your group wishes to participate, please write to pullin at lsu.edu. Locally at LSU, we listen to the talks in 241 Nicholson Hall. You are welcome to join the mailing list, email pullin@lsu.edu your request.
The seminar is coordinated by Jorge Pullin, LSU.
Talks are selected by an Advisory committee: Florian Girelli (Waterloo U), Hal Haggard (Bard College), Guillermo Mena (CSIC, Spain), Francesca Vidotto (CSIC, Spain).
Previous members: Ivan Agullo (LSU), Bianca Dittrich (Perimeter Institute), Simone Speziale (Univ. Aix Marseille), Kristina Giesel (FAU Erlangen), Mercedes Mrtin-Benito (Univ. Complutense), Parampreet Singh (LSU), Jonathan Engle (Florida Atlantic U), Etera Livine (ENS Lyon).
Tuesday, Oct. 3rd
How ubiquitous is entanglement in QFT?
Title:
Spin foams with timelike surfaces
Title:
Discretisation and diffeomorphisms
Title:
Information loss in the CGHS model
PDF of the slides (1.2MB)
Title:
Big bounce and inhomogeneities: a hybrid approach
Title:
Coherent spin networks
Title:
Slow roll inflation in LQG
Title:
Polymer parameterized field theory
Title:
The Asymptotics of 4d Spin Foam Models from SU(2) Asymptotics
Title:
Group field theory and all that
Title:
Spin foams from loop quantum gravity perspective
Title:
Aharonov-Bohm and loop quantum gravity
Title:
Questions and answers about Perturbative quantum gravity
Title:
Recovering low energy physics: A Discussion
Title:
Asymptotics of spin foam models with an Immirzi parameter
Title:
Holographic noise
Title:
Path integrals in loop quantum cosmology
Title:
Interpretation of the Barbero-Immirzi parameter
Title:
Black hole entropy and number theory
Title:
Unitarity and holography in gravitational physics
Title:
Loop quantum cosmos are never singular
Title:
Physical solutions and relative observables via group averaging:
new examples from LQC
Title:
Possibly observable cosmological consequences of quantum gravity
Title:
How constant is the Barbero-Immirzi "constant"?
Title:
Could the seeds of cosmic structure be the first evidence of a Quantum Gravity related phenomena?
Title:
LQC: unfrequently asked questions
Title:
Stepping out of Homogeneity
in Loop Quantum Cosmology
Title: Quantum gravity perspective on AdS/CFT
Title: Manifestly gauge invariant relativistic pertrubation theory
Title: Improved effective equations in loop quantum cosmology
Title: Self Dual Gravity
Title: Quantum gravity and the information loss problem
Title: Schwarzschild interior with loop quantum effects
Title: A connection with everything.
Title: Computations involving SN, SF, QG and LGT.
Audio [.wav 36MB]
Audio [.aif 4MB]
Title: Strong gravity and the BKL conjecture
Title:
The loop quantum gravity vertex: a proposal
Title:
Relational observables and cosmological perturbation theory
Title:
Matter coupling to 3d quantum gravity and effective field theory I
Title:
The KITP program on quantum singularities (encore)
Title:
Effective theories, continuum limit and background independence in LQG
Title:
Emergent chiral excitations of quantum geometries: progress report
Title:
Spherically symmetric loop quantum gravity
Title:
Non metric gravity
Title:
Quantum fields and Noether charges for kappa-spacetime symmetries
PDF of the slides [268k]
Abstract:
After a brief review of the kappa-Poincare' Hopf algebra I will
discuss how it can be used to describe the symmetries of
kappa-Minkowski non-commutative spacetime. In particular I will
focus on how apparent ambiguities in defining the action of
translations can be overcome and how conserved Noether charges can be
associated with such symmetries. Moving from the classical to the
quantum field framework, I will first recall some older results on
perturbative calculations in a path-integral approach for phi^4
scalar field theory. I will then show how recent work on the
symplectic structure of classical kappa-fields suggests a new
approach to canonical quantization of free fields and I will close
with some remarks on the recent efforts and results on such topic.
Title:
Relation between Schroedinger and polymer quantum mechanics
Abstract:
Title:
Diffeomorphism invariance in LQG
Title:
KITP program on singularities summary
Title:
On the UV properties of N=8 supergravity: is it finite?
PDF [190K] of the slides
PDF [196K] of the slides
PDF [171K] of the slides
PDF [171K] of the slides
PDF [430K] of the slides
PDF [700K] of the slides
Abstract:
In quantum field theory, knowing all transition amplitudes or the
S-matrix is usually considered sufficient to specify the physical
content of a theory. We are often accustomed to adopt a similar
attitude when developing quantum gravity, concentrating on technical
advances. I want to start this talk with a reminder that conceptual
problems with the physical interpretation of quantities in quantum
gravity remain open. In particular, I will review the problem of time
and what I shall call the quantum cosmology problem. I will then
review the general boundary formulation of quantum theory and explain
in which sense it addresses these problems. The key conceptual step in
this is a generalization of the probability rule of quantum theory and
of the associated notion of probability conservation. Finally, I want
to discuss the recent application of the general boundary formulation
in the context of graviton amplitudes from a conceptual point of view.
PDF [180K] of the slides
Tuesday October 3rd.
PDF [1MB] of the slides
PDF [2MB] of the slides
Tuesday September 19th.
PDF [46kb] of the slides
Abstract:
Tuesday June 27th.
PDF [223k] of the slides
Abstract:
Tuesday June 20th.
PDF [250k] of the slides
Abstract:
Tuesday June 6th.
PDF [1 MB] of the slides
Abstract:
Relativity group,
Department of Physics and Astronomy, LSU,
Baton Rouge, LA 70803,
Telephone/Fax: 225-578-0464
Ivan Agullo, LSU
LQC and CMB anomalies: A controversy with Scientific American
PDF of the talk (11M)
Audio+Slides of the talk (110M))
SRT (Subtitles) of the talk (100k)
Tuesday, Sep 19th
Viktoria Kabel, Univ. Vienna
Quantum reference frames
PDF of the talk (15M)
Audio+Slides of the talk (300M))
SRT (Subtitles) of the talk (100k)
Tuesday, Sep 5th
Sebastian Steinhaus, University of Jena
Numerical methods in spin foams: recent developments and outlook
PDF of the talk (3.5M)
Audio+Slides of the talk (500M))
SRT (Subtitles) of the talk (100k)
Tuesday, May 16th
Laurent Freidel, Perimeter Institute
Corner symmetry and quantum geometry. A paradigm for quantum gravity
PDF of the talk (4M)
Audio+Slides of the talk (490M))
SRT (Subtitles) of the talk (100k)
Tuesday, May 2nd
Patricia Ribes-Metidieri, Radboud University
PDF of the talk (8M)
Audio+Slides of the talk (360M))
SRT (Subtitles) of the talk (100k)
Tuesday, Apr 18th
Luca Marchetti, Univ. of New Brunswick
Developments on GFT in cosmology
PDF of the talk (1M)
Audio+Slides of the talk (360M))
SRT (Subtitles) of the talk (100k)
Tuesday, April 4th
Beatriz Elizaga, LSU
LQC of black holes in LQG
PDF of the talk (2.5M)
Audio+Slides of the talk (360M))
SRT (Subtitles) of the talk (100k)
Tuesday, March 21st
Johanna Borissova, Perimeter Institute
Spin foam phenomenology
PDF of the talk (1.5M)
Audio+Slides of the talk (250M))
SRT (Subtitles) of the talk (100k)
Tuesday, March 7th
Flaminia Giacomini, ETH Zurich
Quantum reference frames
PDF of the talk (3M)
Audio+Slides of the talk (250M))
SRT (Subtitles) of the talk (100k)
Tuesday, February 21st
Jerzy Lewandowski, University of Warsaw, with A. Bac, W. Kaminski and M. Broda
Conformally invariant approach to Einstein spacetimes with non-zero
cosmological constant includding scri.
PDF of the talk (5M)
Audio+Slides of the talk (150M))
SRT (Subtitles) of the talk (100k)
Tuesday, February 7th
Muxin Han, Parampreet Singh, Ed Wilson-Ewing
Panel on black holes in LQG chaired by Viqar Husain, UNB.
PDF of the talk (Husain) (100k)
PDF of the talk (Han) (1M)
PDF of the talk (Singh) (300k)
PDF of the talk (Wilson-Ewing) (1M)
Audio+Slides of the talk (880M))
SRT (Subtitles) of the talk (100k)
Tuesday, January 24th
Hanno Sahlmann, FAU Erlangen
Chiral super LQG
PDF of the talk (9M)
Audio+Slides of the talk (380M))
SRT (Subtitles) of the talk (100k)
2022
Tuesday, December 6th
Qian Chen, ENS Lyon
Entanglement in spin network states
PDF of the talk (500K)
Audio+Slides of the talk (380M))
SRT (Subtitles) of the talk (100k)
Tuesday, November 22nd
Eugenio Bianchi, Kristina Giesel, Eduardo Martin-Martinez
Panel on quantum information in gravity, chaired by Ivan Agullo.
PDF of the talk (Bianchi) (15M)
PDF of the talk (Giesel) (500K)
PDF of the talk (Martin-Martinez)) (10M)
Audio+Slides of the talk (1.2G))
SRT (Subtitles) of the talk (100k)
Tuesday, November 8th
Mehdi Assanioussi, University of Warsaw
Matter in LQG
PDF of the talk (1M)
Audio+Slides of the talk (260M))
SRT (Subtitles) of the talk (100k)
Tuesday, October 25th
Abhay Ashtekar, PennState
Quantum field theory and space-like singularities
PDF of the talk (300K)
Audio+Slides of the talk (800M))
SRT (Subtitles) of the talk (100k)
Tuesday, October 11th
Thomas Thiemann, FAU Erlangen
Quantum dynamics of LQG
PDF of the talk (200K)
Audio+Slides of the talk (300M))
SRT (Subtitles) of the talk (100k)
Tuesday, September 27th
Alexander Jercher, LMU Munich
Causality in spin foams
PDF of the talk (2M)
Audio+Slides of the talk (500M))
SRT (Subtitles) of the talk (100k)
Tuesday, September 13th
Alejandro Perez, Aix Marseille University
Inflationary phenomena from Planckian discreteness
PDF of the talk (9M)
Audio+Slides of the talk (600M))
SRT (Subtitles) of the talk (100k)
Tuesday, May 17th
Ivan Agullo, Guiellermo Mena, Daniele Oriti
Panel on LQC. Chair: Jorge Pullin
PDF of the talk (Pullin) (100k)
PDF of the talk (Mena) (1M)
PDF of the talk (Oriti) (1M)
PDF of the talk (Agullo) (600K)
Audio+Slides of the talk (1.1G))
SRT (Subtitles) of the talk (100k)
TXT (chat) of the talk (1k)
Tuesday, May 3rd
Marc Geiller, Daniele Pranzetti, Wolfgang Wieland.
Panel on Boundary Degrees of Freedom and Celestial Holography. Chair: Laurent Freidel
PDF of the talk (Freidel) (20k)
PDF of the talk (Geiller) (600k)
PDF of the talk (Wieland) (1.5M)
PDF of the talk (Pranzetti) (5M)
Audio+Slides of the talk (600M))
SRT (Subtitles) of the talk (140k)
Tuesday, Apr 19th
Hongguang Liu, Universitaet Erlangen
Matter couplings in path integral formula of full LQG
PDF of the talk (1M)
Audio+Slides of the talk (400M))
SRT (Subtitles) of the talk (100k)
Tuesday, Apr 5th
Marios Christodoulou, University of Vienna
The search for table-top quantum gravity signatures
PDF of the talk (4M)
Audio+Slides of the talk (500M))
SRT (Subtitles) of the talk (100k)
Tuesday, Mar 22nd
Lucía Menéndez-Pidal, Nottingham University
Clock dependence and unitarity in quantum cosmology
PDF of the talk (0.5M)
Audio+Slides of the talk (530M))
SRT (Subtitles) of the talk (100k)
Tuesday, Mar 8th
José Padua Argüelles, Perimeter Institute
Complex Regge action: causality violations and the Lefschetz thimble
PDF of the talk (4M)
Audio+Slides of the talk (530M))
SRT (Subtitles) of the talk (100k)
Tuesday, Feb 22nd
Pierre Martin-Dussaud, PennState
Causal structure in spin foams
PDF of the talk (2M)
Audio+Slides of the talk (630M))
SRT (Subtitles) of the talk (100k)
Tuesday, Feb 8th
Jeremy Auffinger, Univ. Lyon
Polymerized black hole constraints from Hawking radiation
PDF of the talk (6M)
Audio+Slides of the talk (330M))
SRT (Subtitles) of the talk (100k)
Tuesday, Jan 25th
Adrián del Río, PennState
Imprints of black hole area quantization in gravitational waves
PDF of the talk (8M)
Audio+Slides of the talk (320M))
SRT (Subtitles) of the talk (80k)
2021
Tuesday, Dec. 14th
B. Dittrich, PI, S. Speziale, Marseille, T. Thiemann, Erlangen, E. Wilson-Ewing, UNB
Panel on the future
PDF of the talk (Dittrich) (12M)
PDF of the talk (Speziale) (5M)
PDF of the talk (Thiemann) (150K)
PDF of the talk (Wilson-Ewing) (100K)
Audio+Slides of the talk (700M))
SRT (Subtitles) of the talk (160k)
Tuesday, Nov. 304th
Ahmed Almheiri, IAS-Princeton, Abhay Ashtekar, PennState,
Carlo Rovelli, Univ. Aix-Marseille
Panel on quantum black holes
PDF of the talk (Almheiri) (6200K)
PDF of the talk (Ashtekar) (200K)
PDF of the talk (Rovelli) (5M)
Audio+Slides of the talk (900M))
SRT (Subtitles) of the talk (160k)
Tuesday, Nov 16th
Marcin Kisielowski, NCNR, Warsaw
Homogeneous-isotropic sector of loop quantum gravity: new approach
PDF of the talk (400K)
Audio+Slides of the talk (3400M))
SRT (Subtitles) of the talk (80k)
Tuesday, Nov 2nd
Robert Brandenberger, McGill
Alternatives to cosmological inflation
PDF of the talk (3M)
Audio+Slides of the talk (400M))
SRT (Subtitles) of the talk (80k)
Tuesday, October 19th
Hal Haggard, Bard College
Quantization of the Volume of the Simplest Grain of Space
PDF and Keynote of the talk (6M)
Audio+Slides of the talk (542M)
SRT (Subtitles) of the talk (80k)
Tuesday, October 5th
Dongxue Qu, Florida Atlantic University
Complex critical points and curved geometries in Lorentzian EPRL spinfoam amplitude
PDF of the talk (3M)
Audio+Slides of the talk (390M)
SRT (Subtitles) of the talk (80k)
Tuesday, September 21st
Qiaoyin Pan, Perimeter Institute
How the cosmological constant q-deforms symmetries in LQG
PDF of the talk (10M)
Audio+Slides of the talk (285M)
SRT (Subtitles) of the talk (80k)
Tuesday, September 7th
José Simao, University of Jena
Asymptotics of the Lorentzian EPRL model
PDF of the talk (2M)
Audio+Slides of the talk (481M)
SRT (Subtitles) of the talk (100k)
Tuesday, April 20th
Piotr Chrusciel, Vienna University
Gravitating waveguides
Audio+Slides of the talk (550M)
SRT (Subtitles) of the talk (120k)
Tuesday, April 20th
Sebastian Steinhaus, Jena University
Coarse graining in spin foams
PDF of the talk (4M)
Audio+Slides of the talk (550M)
SRT (Subtitles) of the talk (120k)
Tuesday, April 6h
Wolfgang Wieland,
IQOQI, Austrian Academy of Sciences
Null surfaces as open Hamiltonian systems
PDF of the talk (2M)
Audio+Slides of the talk (330M)
SRT (Subtitles) of the talk (99k)
Tuesday, March 23rd
Rita Neves, Universidad Complutense
Vacuum state for LQC perturbations
PDF of the talk (2M)
Audio+Slides of the talk (150M)
SRT (Subtitles) of the talk (50k)
Tuesday, March 9th
Konstantin Eder, FAU Erlangen
Supergravity in LQG
PDF of the talk (1M)
Audio+Slides of the talk (333M)
SRT (Subtitles) of the talk (100k)
Tuesday, February 23rd
Zichang Huang, Fudan University
Spin foam on Lefschetz Thimble: Markov Chain Monte-Carlo Computation of Lorentzian Spin Foam Propagator in ILQGS
PDF of the talk (6M)
Audio+Slides of the talk (360M)
SRT (Subtitles) of the talk (820)
Tuesday, February 9th
Francesco Gozzini, Aix Marseille University
High performance code for EPRL models
PDF of the talk (10M)
Audio+Slides of the talk (390M)
SRT (Subtitles) of the talk (820K)
Tuesday, January 26th
Norbert Bodendorfer, Regensburg University
Renormalization for cosmological LQG models
PDF of the talk (10M)
Audio+Slides of the talk (1) (130M)
Audio+Slides of the talk (2) (130M)
SRT (Subtitles) of the talk (82K)
SRT (Subtitles) of the talk (82K)
2020
Tuesday, December 8th
Cong Zhang, University of Warsaw
Computing expectation value of full LQG Hamiltonian to next-to-leading order
PDF of the talk (1M)
Audio+Slides of the talk (270M)
SRT (Subtitles) of the talk (820K)
Tuesday, November 24th
Edward Wilson-Ewing, University of New Brunswick
Black hole collapse and bounce in effective loop quantum gravity
PDF of the talk (300k)
Audio+Slides of the talk (640M)
SRT (Subtitles) of the talk (150K)
Tuesday, November 10th
Gioele Botta and Ilkka Makinen, Warsaw University
Quantum-reduced loop gravity: A modern perspective
PDF of the talk (5M)
Audio+Slides of the talk (340M)
SRT (Subtitles) of the talk (150K)
Tuesday, October 27th
Marc Geiller, ENS Lyon
Quantum gravity at the corner
PDF of the talk (1M)
Audio+Slides of the talk (370M)
SRT (Subtitles) of the talk (150K)
Tuesday, October 13th
Henry Maxfield, UC Santa Barbara
BH info paradox and all that
PDF of the talk (1.2M)
Audio+Slides of the talk (460M)
SRT (Subtitles) of the talk (70K)
Tuesday, September 29th
Hal Haggard, Bard College
Effective Spin Foams & the Flatness Problem
PDF of the talk (10M)
Audio+Slides of the talk (360M)
SRT (Subtitles) of the talk (70K)
Tuesday, September 15th
Philipp Hoehn, Okinawa Institute
Progress in relational quantum dynamics
PDF of the talk (14M)
Audio+Slides of the talk (360M)
SRT (Subtitles) of the talk (70K)
Tuesday, September 1st
Maciej Kolanowski, Warsaw University
Lost in translation -- energy in the de Sitter universe
PDF of the talk (800K)
Audio+Slides of the talk (260M)
SRT (Subtitles) of the talk (70K)
Tuesday, May 12th
Alejandro Perez, Universite Aix-Marseille
Title: Atoms of Spacetime: Black Hole Entropy, Information Loss, and the Co\
smological Constant
PDF of the talk (15M)
Audio+Slides of the talk (440M)
SRT (Subtitles) of the talk (140K)
Tuesday, Apr. 28th
Daniele Pranzetti, Perimeter Institute
Title: Edge modes of gravity.
PDF of the talk (18M)
Audio+Slides of the talk (270M)
SRT (Subtitles) of the talk (140K)
Tuesday, Apr. 14th
Muxin Han, Florida Atlantic University
Title: Path integral formulation of LQG, semiclassical limit, and cosmological perturbation theory
PDF of the talk (1M)
Audio+Slides of the talk (340M)
SRT (Subtitles) of the talk (140K)
Tuesday, Mar. 31st.
Madhavan Varadarajan, Raman Research Institute
Title: Spacetime covariance and propagation in canonical LQG
PDF of the talk (2M)
Audio+Slides of the talk (300M)
SRT (Subtitles) of the talk (115K)
Tuesday, Mar. 17th.
Daniele Oriti, LMU Munich
Title: Status of GFT
PDF of the talk (45M)
Audio+Slides of the talk (233M)
SRT (Subtitles) of the talk (85K)
Tuesday, Mar. 3rd.
Eugenio Bianchi, Jonathan Engle, Simone Speziale (PSU,FAU,Marseille)
Title: Panel on the status of the vertex
PDF of the talk (15M)
Audio+Slides of the talk (260M)
SRT (Subtitles) of the talk (85K)
Tuesday, Feb. 18th.
Brajesh Gupt/Abhay Ashtekar, TACC/PSU
Title: Alleviating tensions in the CMB using LQC.
PDF of the talk (7M)
Audio+Slides of the talk (230M)
SRT (Subtitles) of the talk (85K)
Tuesday, Feb. 4th.
Parampreet Singh, LSU
Title: Effect of ambiguities in loop cosmology on primordial power spectrum
PDF of the talk (1M)
Audio+Slides of the talk (260M)
SRT (Subtitles) of the talk (60K)
Tuesday, Jan 21st.
Maciej Ossowski, Warsaw University
Title: Kerr-NUT-(A)dS spacetimes that admit non-singular horizons
PDF of the talk (1M)
Audio+Slides of the talk (220M)
SRT (Subtitles) of the talk (60K)
2019
Tuesday, Dec 3rd.
Fabio Mele and Johannes Muench, University of Regensburg
Title: Effective Quantum Extended Spacetime of Polymer Schwarzschild Black Hole
PDF of the talk (700k)
Audio+Slides of the talk (220M)
SRT (Subtitles) of the talk (60K)
Tuesday, Nov 19
Wojciech Kaminski, University of Warsaw
Title: Volume operator in LQC
PDF of the talk (600k)
Audio+Slides of the talk (122M)
SRT (Subtitles) of the talk (60K)
Tuesday, Nov 5
Aldo Riello, Perimeter Institute
Title: Quasilocal holography in Quantum Gravity in 3 Dimensions
PDF of the talk (13M)
Audio+Slides of the talk (220M)
SRT (Subtitles) of the talk (60K)
Tuesday, Oct 22
Wolfgang Wieland, Perimeter Institute
Title: Quasi-local energy from LQG boundary modes
PDF of the talk (700K)
Audio+Slides of the talk (200M)
SRT (Subtitles) of the talk (60K)
Tuesday, Oct 8
Muxin Han, Florida Atlantic University
Title: Effective dynamics from full loop quantum gravity
PDF of the talk (1M)
Audio+Slides of the talk (272M)
SRT (Subtitles) of the talk (98K)
Tuesday, Sep 24th
Alejandro Corichi, UNAM Morelia
Title:Some comment on canonical gaute theories with boundaries
PDF of the talk (136K)
Audio+Slides of the talk (200M)
SRT (Subtitles) of the talk (89K)
Tuesday, Sep 10th
Bianca Dittrich, Perimeter Institute
Title: Quantum geometry from higher gauge theory
PDF of the talk (6M)
Audio+Slides of the talk (180M)
SRT (Subtitles) of the talk (63K)
Tuesday, May 14th
Klaus Liegener, LSU
Title: New Loop Quantum Cosmology modifications from Symplectic Structures
PDF of the talk (2M)
Audio+Slides of the talk (38M)
Tuesday, Apr 30th
Marios Christodoulou, University of Hong Kong
Title: The possibility of experimental detection of the discreteness of time
PDF of the talk (230K)
Audio+Slides of the talk (21M)
Tuesday, Apr 16th
Jerzy Lewandowski, University of Warsaw
Title: Isolated Horizon equations: type D, extremal, NHG
PDF of the talk (20M)
Audio+Slides of the talk (50M)
Tuesday, Apr 2nd
Eugenio Bianchi, PennState
Title: Page theorem and the entropy of Bell-network states
PDF of the talk (5M)
Audio+Slides of the talk (40M)
Tuesday, Mar 19th
Lee Smolin, Perimeter Institute
Title: Implications of a dynamical cosmological constant
PDF of the talk (10M)
Audio+Slides of the talk (28M)
Tuesday, Mar 5th
Hongguang Liu, Aix Marseille University
Title: Asymptotic analysis of spin foam amplitude with timelike triangles
PDF of the talk (1M)
Audio+Slides of the talk (50M)
Tuesday, Feb. 19th
Andrea Dapor, LSU
Title: Toward LQG effective dynamics
PDF of the talk (250K)
Audio+Slides of the talk (57M)
Tuesday, Feb. 5th
Parampreet Singh, LSU
Title: Modified loop quantum cosmologies
PDF of the talk (2M)
Audio+Slides of the talk (52M)
Tuesday, Jan. 22nd
Barak Shoshany, Perimeter Institute
Title: 2+1D loop quantum gravity on the edge
PDF of the talk (9M)
Audio+Slides of the talk (32M)
2018
Tuesday, Dec. 4th
Konstantin Eder, Hanno Sahlmann, FAU Erlangen
Title: Quantum theory of charged isolated horizons
PDF of the talk (600K)
Audio+Slides of the talk (32M)
Tuesday, Nov 20
Bianca Dittrich, Perimeter Institute
Title: A holographic description for boundary gravitons in 4D
PDF of the talk (5M)
Audio+Slides of the talk (38M)
Tuesday, Nov 6
Zichang Huang, Florida Atlantic
Title: Emerging Gravitational Waves from Spin Foam Model
PDF of the talk (2M)
Audio+Slides of the talk (43M)
Tuesday, Oct 23rd
Aldo Riello, Perimeter Institute
Title: A unified geometric framework for boundary charges and dressings
PDF of the talk (2M)
Audio+Slides of the talk (41M)
Tuesday, Oct 9th
Javier Olmedo, LSU
Title: Quantum Extension of Kruskal Black Holes
PDF of the talk (500k)
Audio+Slides of the talk (17M)
Tuesday, Sep 25th
Benjamin Bahr, DESY
Title: 4-volume in spin foam models from knotted boundary graphs
PDF of the talk (3M)
Audio+Slides of the talk (15M)
Tuesday, May 15th
Denis Dobkowski-Rylko, University of Warsaw
Title: Isolated horizons of the Petrov type D
PDF of the talk (5M)
Audio+Slides of the talk (5M)
Tuesday, Apr 17th
Kristina Giesel, FAU Erlangen
Title: Gauge invariant observables for cosmological perturbations
PDF of the talk (8M)
Audio+Slides of the talk (15M)
Tuesday, Apr 3rd
Hal Haggard, Bard College
Title: Quantum Gravity Inside and Outside Black Holes
PDF of the talk (5M)
Audio+Slides of the talk (19M)
Tuesday, Mar 20th
Keren Li, Tsinghua University
Title: Quantum spacetime on a quantum simulator
PDF of the talk (3M)
Audio+Slides [.mp4 11MB]
Tuesday, Apr 3rd
Hal Haggard, Bard College
Title: TBA
Tuesday, Mar 6th
Ivan Agullo, LSU
Title: Non-Gaussianity from LQC
PDF of the talk (22M)
Audio+Slides [.mp4 19MB]
Tuesday, Feb 6th
Ilya Vilensky, Florida Atlantic University
Title: The unique form of dynamics in LQC
PDF of the talk (0.5M)
Audio+Slides [.mp4 11MB]
Tuesday, Jan 23rd
Cong Zhang, Univ. Warsaw/Beijing
Title: Some analytical results about the Hamiltonian operator in LQG
PDF of the talk (1.7M)
Audio+Slides [.mp4 10MB]
2017
Tuesday, Dec 5th
Marco Finocchiaro, Albert Einstein Institute
Title: Recursive graphical construction of GFT Feynman diagrams
PDF of the talk (1M)
Audio+Slides [.mp4 24MB]
Tuesday, Nov 21st
Antonio Zapata, UNAM Morelia
Title: From coarse graining for quantum gravity to
topological charges in discretized gauge theories
PDF of the talk (1M)
Audio+Slides [.mp4 9MB]
Tuesday, Nov 7th
Eugenio Bianchi, PennState
Title: Entanglement in loop quantum gravity
PDF of the talk (9M)
Audio+Slides [.mp4 19MB]
Tuesday, Oct 24th
Marios Christodoulou, Aix Marseille U/SUSTec Shenzen
Title: Geometry transition in covariant LQG: black to white
PDF of the talk (3M)
Audio+Slides [.mp4 11MB]
Tuesday, Oct 10th
Pietro Dona, Penn State
Title: SU(2) graph invariants, Regge actions and polytopes
PDF of the talk (10M)
Audio+Slides [.mp4 16MB]
Tuesday, Sept 26th
Andrea Dapor and Klaus Liegener, FAU Erlangen
Title: Cosmological Effective Hamiltonian from full Loop Quantum Gravity
PDF of the talk (2.2M)
Audio+Slides [.mp4 13MB]
Tuesday, Sept 12th
Eyo Eyo Ita, University of South Africa
Title: Intrinsic time quantum geometrodynamics: emergence of General Relativity and cosmic time
PDF of the talk (1.5M)
Audio+Slides [.mp4 8MB]
Tuesday, May 2nd
Marco Finocchiaro, Albert Einstein Institute
Title: Simplicial Group Field Theory models for euclidean quantum gravity: recent developments
PDF of the talk (2M)
Audio+Slides [.mp4 15MB]
Tuesday, Apr 18th
Bianca Dittrich, Perimeter Institute
Title: (3+1) LQG with homogeneously curved vacuum
PDF of the talk (8M)
Audio+Slides [.mp4 17MB]
Tuesday, Apr 4th
Parampreet Singh, LSU
Title: Transition times through the black hole bounce
PDF of the talk (2M)
Audio+Slides [.mp4 18MB]
Tuesday, March 21st
Norbert Bodendorfer, LMU Munich
Title: Holographic signatures of resolved cosmological singularities
PDF of the talk (2M)
Audio+Slides [.mp4 10MB]
Tuesday, March 7th
Jerzy Lewandowski, University of Warsaw
Title: Physical observers in GR and their symmetries
PDF of the talk (2M)
Audio+Slides [.mp4 10MB]
Tuesday, February 21st
Kirill Krasnov, University of Nottingham
Title: 3D/4D gravity as the dimensional reduction of a theory of differential forms in 6D/7D
PDF of the talk (5M)
Audio+Slides [.mp4 16MB]
Tuesday, February 7th
Muxin Han, Florida Atlantic University
Title: Loop Quantum Gravity, Tensor Network, and Holographic Entanglement Entropy
PDF of the talk (2M)
Audio+Slides [.mp4 18MB]
Tuesday, January 24th
Alexander Kegeles, Albert Einstein Institute
Title: Field theoretical aspects of GFT: symmetries and representations
PDF of the talk (1M)
Audio+Slides [.mp4 11MB]
2016
Tuesday, Dec 6th
Aldo Riello, Perimeter Institute
Title:
The observer's ghost
PDF of the talk (2M)
Audio [.mp4 11MB]
Tuesday, Nov 22nd
Hal Haggard, Bard College
Title:
New perspectives on polyhedra
PDF of the talk (5M)
Audio+Slides [.mp4 12MB]
Tuesday, Nov 8th
Simone Speziale, Marseille
Title:
Progress in twisted geometries and spin foam transition amplitudes
PDF of the talk (20M)
Audio+Slides [.mp4 20MB]
Tuesday, Oct. 25th
Wolfgang Wieland, Perimeter Institute
Title:
Loop quantum gravity from the quantum theory of
impulsive gravitational waves
PDF of the talk (500K)
Audio+Slides [.mp4 20MB]
Tuesday, Oct. 11th
Clement Delcamp, Perimeter Institute
Title:
Fusion basis for lattice gauge theory and loop quantum gravity
PDF of the talk (500K)
Audio [.mp4 11MB]
Tuesday, Sept. 27th
Daniele Pranzetti, SISSA Trieste
Title:
CFT degrees of freedom from LQG boundary exitations
PDF of the talk (9M)
Audio [.wav 29MB]
Audio [.mp4 9MB]
Tuesday, Sept. 13th
Madhavan Varadarajan, Raman Research Institute
Title:
Propagation in polymer parameterized field theory
PDF of the talk (2M)
Audio [.wav 84MB]
Tuesday, Aug 30th
Brajesh Gupt, Penn State
Title:
Quantum Gravity in the Sky: Interplay between theory and observations
PDF of the talk (8.5M)
Audio [.wav 35MB]
Tuesday, May 3rd
Cristian Fleischack, Emanuele Alesci, Jonathan Engle
Title:
Panel on symmetry reduction: from LQG to LQC
PDF of the talk (4M)
Audio [.wav 42MB]
Tuesday, Apr 19th
Parampreet Singh, LSU
Title:
How do quantization ambiguities affect the spacetime across the central
singularity?
PDF of the talk (1.2M)
Audio [.wav 53MB]
Tuesday, Apr 5th
Wolfgang Wieland, Perimeter Institute
Title:
Covariant loop quantum gravity as a topological theory with defects
PDF of the talk (541K)
Audio [.wav 45MB]
Tuesday, Mar 22nd
Javier Olmedo, LSU
Title:
Self gravitating shells in a quantum geometry
PDF of the talk (414K)
Audio [.wav 35MB]
Tuesday, Mar 8th
Sebastian Steinhaus, Univ. Hamburg
Title:
Numerical indications for a phase transition in 4d spin foam models
PDF of the talk (1MB)
Audio [.wav 54MB]
Tuesday, Feb 9th
Abhay Ashtekar, Penn State
Title: The Issue of Information Loss: Current Status
PDF of the talk (500K)
Audio [.wav 93MB]
Tuesday, Feb 9th
Marc Geiller, Perimeter Institut
Title: LQG as an extende TQFT
PDF of the talk (359K)
Audio [.wav 40MB]
Tuesday, Jan. 26th
Jerzy Lewandowski, Univ. Warszaw
Title: When isolated horizons met near horizon geometries
PDF of the talk (2.2MB)
Audio [.wav 25MB]
2015
Tuesday, Dec. 8th
Norbert Bodendorfer, Univ. Warszaw
Title: Quantum symmetry reductions based on classical gauge fixings
PDF of the talk (1.4MB)
Audio [.wav 35MB]
YouTube.
Tuesday, Nov. 24th
Mehdi Assanioussi, Univ. Warszaw
Title: On deparametrized models in LQG
PDF of the talk (1.6MB)
Audio [.mp3 27MB]
Tuesday, Nov. 10th
Jedrzej Swiezewski, Univ. Warszaw
Title: Developments on the radial gauge
PDF of the talk (4MB)
Audio [.mp3 40MB]
Tuesday, Oct. 27th
Eyo Eyo Ita, USNA
Title: Intrinsic time in quantum geometrodynamics
PDF of the talk (350k)
Audio [.wav 20MB]
Tuesday, Oct. 13th
Ivan Agulló, LSU
Title: Loop Quantum Cosmology, Non-Gaussianity, and CMB anomalies
PDF of the talk (8MB)
Audio [.mp3 23MB]
Tuesday, Sept. 29th
Eugenio Bianchi, PennState
Title: Squeezed spin-networks and entanglement
PDF of the talk (7MB)
Audio [.mp3 30MB]
Tuesday, Sept. 15th
Bianca Dittrich, Perimeter Institute
Title: 3D holography
PDF of the talk (15MB)
Audio [.wav 38MB]
Tuesday, Sept. 1st
Benjamin Bahr, DESY
Title: Numerical investigations of the EPRL model
PDF of the talk (2MB)
Audio [.wav 41MB]
Tuesday, May 5th
Lorenzo Sindoni, Albert Einstein Institute
Title: Generalized GFT condensates and Cosmology
PDF of the talk (2MB)
Audio [.wav 32MB]
Tuesday, Apr 21st
Fernando Barbero, CSIC, Madrid
Title: Separability and quantum mechanics
PDF of the talk (758k)
Audio [.wav 20MB]
Tuesday, Apr 7th
Jorge Pullin, LSU
Title: Backreaction of the Hawking radiation on a quantum space-time
PDF of the talk (755k)
Audio [.wav 20MB]
Tuesday, Mar 24th
Matteo Smerlak, Perimeter Institute
Title: Information loss
PDF of the talk (1M)
Audio [.wav 35MB]
Tuesday, Mar 10th
Muxin Han, Florida Atlantic University
Title: Quantum curves
PDF of the talk (5.6M)
Audio [.wav 46MB]
Tuesday, Feb 24th
Steffen Gielen, Imperial College
Title: Cosmology with group field theory condensates
PDF of the talk (136K)
Audio [.wav 39MB]
Tuesday, Feb 10th
Alejandro Perez
Title: No firewalls in quantum gravity
PDF of the talk (5.5MB)
Audio [.wav 45MB]
Tuesday, Jan 27th
Andrea Dapor
Title: Rainbows from quantum gravity
PDF of the talk (0.3MB)
Audio [.mp3 33MB]
2014
Tuesday, Dec 9th
Maximilian Hanusch
Title: Invariance of Connections and Measures in Loop Quantum Cosmology
PDF of the talk (0.5MB)
Audio [.wav 32MB]
Tuesday, Nov 25th
Hal Haggard, Bard College and Aldo Riello, Perimeter Institute
Title: SL(2,C) Chern-Simons Theory and Spinfoam Gravity with a Cosmological Constant
PDF of the talk (4MB)
Audio [.wav 32MB]
Tuesday, Nov 11th
Philipp Hoehn, Perimeter Institute
Title: Quantum theory from information inference principles
PDF of the talk (800k)
Audio [.wav 40MB]
Tuesday, Oct 28th
Jerzy Lewandowski, Warszaw
Title: New applications for LQG
PDF of the talk (424k)
Audio [.wav 33 MB]
Local Audio [.mp3 33 MB]
Tuesday, Oct 14th
Carlo Rovelli, Marseille
Title: White holes
PDF of the talk (1.3Mb)
Audio [.wav 41MB]
Tuesday, September 30th
Brajesh Gupt, PennState
Title: Phenomenological consequences of quantum geometries in LQC
PDF of the talk (1.9Mb)
Audio [.wav 24MB]
Tuesday, September 16th
Wolfgang Wieland, PennState
Title: Covariant loop quantum gravity: Its classical action, phase space and gauge symmetries
PDF of the talk (1Mb)
Audio [.wav 36MB]
Tuesday, September 2nd
Javier Olmedo, LSU
Title: Casimir effect on a quantum geometry
PDF of the talk (182k)
Audio [.wav 20MB]
Tuesday, May 13th
Jorge Pullin, LSU
Title: Hawking radiation in loop quantum gravity
PDF of the talk (600k)
Audio [.wav 25MB]
Tuesday, April 29th
Ivan Agullo, Aurelien Barrau, Guillermo Mena
Title: LQC and the very early universe
PDF of the talk - Agullo (1M)
PDF of the talk - Barrau (1M)
PDF of the talk - Mena(3M)
Audio [.wav 41MB]
Tuesday, April 15th
Antonia Zipfel, Warszaw
Title: Linking canonical and covariant LQG
PDF of the talk (0.5M)
Audio [.wav 30MB]
Tuesday, April 1st
Laurent Freidel, Perimeter Institute
Title: Continuum limit and renormalization
PDF of the talk (10M)
Audio [.wav 49MB]
Tuesday, Mar 18th
Max Dohse, UNAM-Morelia
Title: S-matrices for General Boundary QFT on Anti de Sitter spacetime
PDF of the talk (4.6M)
Audio [.wav 36MB]
Tuesday, Mar 4th
Marc Geiller, Penn State and Simone Speziale, Marseille
Title: Discussion on simplicity constraints in spin foam models
PDF of the talk (400K)
Audio [.wav 31MB]
Tuesday, Feb 18th
Sebastian Steinhaus, Perimeter Institute
Title: Quantum group spin nets: refinement limit and relation to spin foams
PDF of the talk (620K)
Audio [.wav 37MB]
Tuesday, Feb 4th
Bianca Dittrich, Perimeter Institute
Title: A new vacuum for loop quantum gravity
PDF of the talk (11M)
Audio [.wav 70MB]
Tuesday, Jan. 21st
Pietro Dona, Sissa
Title: Matter matters in asymptotically safe quantum gravity
PDF of the talk (213K)
Audio [.wav 34MB]
Audio [.aif 3.4MB]
2013
Tuesday, Dec. 10th
Saeed Rastgoo, UNAM Morelia
Title: Towards the resolution of the CGHS singularity in LQG
PDF of the talk (380K)
Audio [.wav 24MB]
Audio [.aif 2.4MB]
Tuesday, Nov. 26th
Johannes Thürigen, Albert Einstein Institute
Title: Spectral dimension of quantum geometries
PDF of the talk (1MB)
Audio [.wav 39MB]
Audio [.aif 4.1MB]
Tuesday, Nov. 12th
Tim Koslowski, Univ. New Brunswick
Title: What can we learn from shape dynamics?
PDF of the talk (500k)
Audio [.wav 39MB]
Audio [.aif 4.1MB]
Tuesday, Oct. 29th
Asieh Karami, UNAM Morelia
Title: Bianchi IX LQC: Quantization
ambiguity and effective description
PDF of the talk (600k)
Audio [.wav 15MB]
Audio [.aif 1.5MB]
Tuesday, Oct. 15th
Derek Wise, FAU Erlangen
Title: Holographic special relativity: observer space from conformal geometry
PDF of the talk (600k)
Audio [.wav 38MB]
Audio [.aif 4MB]
Tuesday, Oct. 1st
Norbert Bodendorfer, PennState
Title: Black hole entropy from LQG: higher dimensions and generalized theories
PDF of the talk (300k)
Audio [.wav 38MB]
Audio [.aif 4MB]
Tuesday, Sept. 17th.
Hal Haggard, CPT Marseille
Title: Thermality of spherical causal domains & the entanglement spectrum
PDF of the talk (7MB)
Audio [.wav 33MB]
Audio [.aif 4MB]
Tuesday, Sept. 3rd.
Jose Antonio Zapata, UNAM Morelia
Title: Multisymplectic effective General Boundary Field Theory
PDF of the talk (900k)
Audio [.wav 35MB]
Audio [.aif 4MB]
Tuesday, May 7th.
Yasha Neiman, PennState
Title: The imaginary part of the GR action and the large-spin 4-simplex amplitude
PDF of the talk (300k)
Audio [.wav 73MB]
Audio [.aif 4MB]
Tuesday, Apr. 23rd.
Martin Bojowald, PennState
Title:
A loop quantum multiverse?
PDF of the talk (170k)
Audio [.wav 43MB]
Audio [.aif 4MB]
Tuesday, Apr. 9th
Wolfgang Wieland, CPT Marseille
Title: Hamiltonian spinfoam gravity
PDF of the talk (1.5Mb)
Audio [.wav 36MB]
Audio [.aif 3MB]
Tuesday, Mar 26th.
Brajesh Gupt, LSU
Title: Bianchi I LQC, Kasner transitions and inflation
PDF of the talk (800k)
Audio [.wav 30MB]
Audio [.aif 3MB]
Tuesday, Mar 12th.
Emanuele Alesci, Francesco Cianfrani
Title: Quantum reduced loop gravity
PDF of the talk (4Mb)
Audio [.wav 29MB]
Audio [.aif 3MB]
Tuesday, Feb 26th.
Stephon Alexander
Title: Gravity electroweak unification
PDF of the talk (8Mb)
Audio [.wav 32MB]
Audio [.aif 4MB]
Tuesday, Feb 12th.
Hal Haggard, CPT Marseille
Title: Dynamical chaos and the volume gap
PDF of the talk (8Mb)
Audio [.wav 37MB]
Audio [.aif 4MB]
Tuesday, Jan 29th.
Eugenio Bianchi, Perimeter Institute.
Title:
Entanglement in loop quantum gravity
PDF of the talk (3Mb)
Audio [.wav 81MB]
Audio [.aif 4MB]
2012
Tuesday, Nov 27th.
Bianca Dittrich, Perimeter Institute
Title:
Coarse graining: towards a cylindrically consistent dynamics
PDF of the talk (14Mb)
Audio [.wav 41MB]
Audio [.aif 4MB]
Tuesday, Nov 13th.
Simone Speziale, CPT-CNRS Marseille
Title:
Twistorial structure of
loop quantum gravity transition amplitudes
PDF of the talk (600k)
Audio [.wav 32MB]
Audio [.aif 3MB]
Tuesday, Oct 30th.
Sylvain Carrozza, Albert Einstein Institute
Title:
Renormalization of Tensorial Group Field Theories
PDF of the talk (1.3M)
Audio [.wav 45MB],
Audio [.aif 4MB].
Tuesday, Oct 16th.
Eugenio Bianchi, Perimeter Institute
Title:
Horizon entropy from loop gravity
PDF of the talk (7M)
Audio [.wav 42MB],
Audio [.aif 4MB].
Tuesday, Oct 2nd.
Derek Wise, FAU Erlangen
Title:
Lifting General Relativity to Observer Space
PDF of the talk (700k)
Audio [.wav 34MB],
Audio [.aif 3MB].
Tuesday, Sept 18th.
Lorenzo Sindoni, Albert Einstein Institute
Title:
Flux coherent states
PDF of the talk (2Mb)
Audio [.wav 38MB],
Audio [.aif 4MB].
Tuesday, Sept 4th.
Frank Hellmann, Albert Einstein Institute
Title:
Holonomy Spin Foam Models: Asymptotic Dynamics
PDF of the talk (0.39Mb)
Audio [.wav 32MB],
Audio [.aif 3MB].
Tuesday, May 8th.
Richard Woodard, University of Florida
Title:
Graviton Corrections to Maxwell's Equations
PDF of the talk (0.15Mb)
Audio [.wav 24MB],
Audio [.aif 2MB].
Tuesday, Apr 24th.
Seabastian Steinhaus, Albert Einstein Institute
Title:
Path integral measure and triangulation independence in discrete gravity
PDF of the talk (0.5Mb)
Audio [.wav 24MB],
Audio [.aif 2MB].
Tuesday, Apr 10th.
Tim Koslowski, Perimeter Institute
Title:
Effective Field Theories for Quantum Gravity form Shape Dynamics
PDF of the talk (0.5Mb)
Audio [.wav 31MB],
Audio [.aif 3MB].
Tuesday, Mar 27th.
Alejandro Perez, Marseille
Title:
Black hole entropy in LQG: new insights from a local perspective
PDF of the talk (3.5Mb)
Audio [.wav 47MB],
Audio [.aif 5MB].
Tuesday, Mar 13th.
Jacobo Diaz-Polo, LSU
Title:
Black hole evaporation in LQG
PDF of the talk (2.5Mb)
Audio [.wav 38MB],
Audio [.aif 4MB].
)
Tuesday, Feb 28th.
Marc Geiller, Univ. Paris
Title:
Continuous formulation of the LQG phase space
PDF of the talk (400k)
Audio [.wav 36MB],
Audio [.aif 4MB].
Tuesday, Feb 14th.
Claudio Perini, PennState
Title:
Classical limit of spin foams on arbitrary tri
angulations
PDF of the talk (2MB)
Audio [.wav 40MB],
Audio [.aif 4MB].
Tuesday, Jan 31st.
Parampreet Singh, LSU
Title:
Physics of Bianchi models in LQC
PDF of the talk (500KB)
Audio [.wav 40MB],
Audio [.aif 4MB].
2011
Tuesday, Nov. 29th
Philipp Hoehn, University of Utrecht
Title:
A canonical formalism for simplicial gravity
PDF of the talk (700KB)
Audio [.wav 40MB],
Audio [.aif 4MB].
Tuesday, Nov. 15th
Jonathan Engle, Florida Atlantic Univesrity
Title:
Plebanski sectors of the new spin foam models
PDF of the talk (3.5MB)
Audio [.wav 38MB],
Audio [.aif 4MB].
Tuesday, Nov. 1st
Tim Koslowski, Perimeter Institute
Title:
Shape dynamics
PDF of the talk (500k)
Audio [.wav 33MB],
Audio [.aif 3MB].
Tuesday, Oct. 18th
William Nelson, PennState
Title:
Inhomogeneous loop quantum cosmology
PDF of the talk (500k)
Audio [.wav 32MB],
Audio [.aif 3MB].
Tuesday, Oct. 4th
Norbert Bodendorfer/Andreas Thurn
Title:
An invitation to the new variables with possible applications
PDF of the talk (500k)
Audio [.wav 35MB],
Audio [.aif 3MB],
Audio [.mp3 40MB high-quality].
Tuesday, Sept. 20th
Jacek Puchta, University of Warszaw
Title:
The Feynman diagramatics for the spin foam models
PDF of the talk (3MB)
Audio [.wav 35MB],
Audio [.aif 3MB].
Tuesday, May 10th
Daniele Oriti, Albert Einstein Institute
Title:
Quantum geometry: its dynamics, symmetries and statistics in the group
field theory formalism
PDF of the talk (1.5MB)
Audio [.wav 40MB],
Audio [.aif 4MB].
Tuesday, Apr 26th
Razvan Gurau, Perimeter Institute
Title:
The 1/N expansion in colored tensor models
PDF of the talk (400k)
Audio [.wav 33MB],
Audio [.aif 3MB].
Tuesday, Apr 12th
James Ryan, Albert Einstein Institute
Title:
Simplicity constraints and the role of the Immirzi parameter in quantum gravity
PDF of the talk (11MB)
Audio [.wav 19MB],
Audio [.aif 2MB].
Tuesday, Mar 29th
Ivan Agullo, PennState
Title:
Observational signatures in LQC
PDF of the slides (6MB)
Audio [.wav 36MB],
Audio [.aif 3MB].
Tuesday, Mar 15th
Winston Fairbairn, Hamburg University
Title:
Quantum deformation of 4d spin foam models
PDF of the slides (300k)
Audio [.wav 36MB],
Audio [.aif 3MB].
Tuesday, Mar 1st
Laurent Freidel, Perimeter Institute
Title:
The principle of relative locality
PDF of the slides (7MB)
Audio [.wav 40MB],
Audio [.aif 4MB].
Tuesday, Feb 15th
Tomasz Pawlowski, University of New Brunswick
Title:
Semiclassicality of the loop quantum universe
PDF of the slides (1MB)
Audio [.wav 26MB],
Audio [.aif 2MB].
Tuesday, Feb 1st
Francesca Vidotto, Marseille
Title:
Spinfoam cosmology
PDF of the slides (3 MB)
Audio [.wav 26MB],
Audio [.aif 2MB].
Tuesday, Jan 18th
Gianluca Calcagni, Albert Einstein Institute
Title:
Inflationary observables and observational constraints in LQC
PDF of the slides (1.5MB)
Audio [.wav 40MB],
Audio [.aif 4MB].
Blog post
2010
Tuesday, Nov 30th
Matteo Smerlak, ENS Lyon
Title:
Bubble divergences in state-sum models
PDF of the slides (180k)
Audio [.wav 25MB],
Audio [.aif 5MB].
Tuesday, Nov 16th
Madhavan Varadarajan, Raman Research Institute
Title:
LQG dynamics: insights from parameterized field theory
PDF of the slides (1.2M)
Audio [.wav 82MB],
Audio [.aif 4MB].
Blog post
Tuesday, Nov 2nd
Jerzy Lewandowski, Warszaw
Title:
New results: operator spin foams, SL(2,C)
PDF of the slides (766k)
Audio [.wav 42MB],
Audio [.aif 4MB].
Tuesday, Oct 26th
Jerzy Lewandowski, Warszaw
Title:
LQG with all the degrees of freedom
PDF of the slides (111k) (updated)
PDF of the slides (1MB)
Audio [.wav 33MB],
Audio [.aif 3MB].
Tuesday, Oct 19th
Eugenio Bianchi, Marseille
Title:
The cosmological constant (non)-problem
PDF of the slides (1MB)
Audio [.wav 33MB],
Audio [.aif 3MB].
Tuesday, Sept 21st
Abhay Ashtekar, PennState
Title:
Quantum evaporation of 2-d black holes
Blog post
PDF of the slides (500k)
Audio [.wav 45MB],
Audio [.aif 4MB].
Tuesday, May 4th
Alejandro Perez, CPT Marseille
Title:
Black hole entropy: an SU(2) gauge invariant treatment
PDF of the slides (4MB)
Audio [.wav 36MB],
Audio [.aif 4MB].
Tuesday, April 20
Jose Antonio Zapata, UNAM Morelia
Title:
Curvature
PDF of the slides (0.5MB)
Audio [.mp3 9MB],
Audio [.aif 4MB].
Tuesday, April 6
Forian Conrady, Perimeter Institute
PDF of the slides (1MB)
Audio [.wav 29MB],
Tuesday, March 23
Benjamin Bahr, Albert Einstein Institute
PDF of the slides (1.7MB)
Audio [.wav 31MB],
Audio [.aif 3MB].
Tuesday, March 9
Fethi Ramazanoglu, Princeton
Audio [.wav 41MB],
Audio [.aif 4MB].
Tuesday, February 16th
Tomasz Pawlowski, CSIC Madrid
PDF of the slides (1.5MB)
Audio [.mp3 12MB],
Audio [.aif 5MB].
Tuesday, February 2nd
Claudio Perini, Marseille/Rome
PDF of the slides (0.25MB)
Audio [.wav 32MB],
Audio [.aif 3MB].
Tuesday, Jan 19th
David Sloan, PennState
PDF of the slides (0.5MB)
Audio [.mp3 8MB],
Audio [.aif 3MB].
2009
Tuesday, Dec 1st
Alok Laddha, Raman Research Institute
PDF of the slides (1.5MB)
Audio [.wav 37MB],
Audio [.aif 3MB].
Tuesday, Nov 17th
Frank Hellmann, University of Nottingham
PDF of the slides (216k)
Audio [.wav 37MB],
Audio [.aif 3MB].
Tuesday, Nov 3rd
Daniele Oriti, Albert Einstein Institute
PDF of the slides (400k)
Audio [.wav 39MB],
Audio [.aif 4MB].
Tuesday, October 20th
Jerzy Lewandowski, Warszaw University
PDF of the slides (1.2MB)
Audio [.wav 38MB],
Audio [.aif 4MB].
Tuesday, October 6th
Eugenio Bianchi, CPT Marseille
PDF of the slides (430k).
Audio [.mp3 5MB]
Tuesday, September 22nd
Richard Woodard, University of Florida
PDF of the slides (170k).
Audio [.mp3 10MB],
Audio [.aif 4MB].
Tuesday, May 5th
Abhay Ashtekar, Laurent Freidel, Carlo Rovelli
PDF of the slides (4MB).
Audio [.mp3 12MB],
Tuesday, Apr 21st
John Barrett, Nottingham
PDF of the slides (128kB).
Audio [.wav 51MB],
Audio [.aif 5MB].
Tuesday, Mar 31st
Craig Hogan, Fermilab
PDF of the slides (12MB).
Audio [.wav 41MB],
Audio [.aif 4MB].
Tuesday, Mar 17th
Adam Henderson, PennState
PDF of the slides (1.7M).
Audio [.wav 32MB],
Audio [.aif 3MB].
Tuesday, Mar 3rd
Simone Mercuri, PennState
PDF of the slides (135k).
Audio [.mp3 8MB],
Tuesday, Feb 10th
Jacobo Diaz-Polo, Valencia
PDF [1MB] of the slides
Audio [.wav 30MB],
Audio [.aif 3MB]
Tuesday, Jan 13th
Donald Marolf, UC Santa Barbara
PDF [360k] of the slides
Audio [.mp3 13MB]
2008
Tuesday, Nov 18th
Parampreet Singh, Perimeter Institute
PDF [277k] of the slides
Audio [.wav 36MB]
Audio [.wav 2.4MB]
Tuesday, Nov 4th
Jerzy Lewandowski, Warszaw
PDF [160k] of the slides
Audio [.wav 32MB]
Audio [.aif 3MB]
Tuesday, Oct 21st
Lee Smolin, Perimeter Institute
PDF [4.6MB] of the slides
Audio [.wav 41MB]
Audio [.aif 4MB]
Tuesday, Oct 21st
Nico Yunes, Princeton
PDF [3.7M] of the slides
Audio [.wav 26MB]
Audio [.aif 2MB]
Tuesday, Sept 9th
Daniel Sudarsky, UNAM, Mexico
PDF [1.8M] of the slides
Audio [.wav 36MB]
Audio [.aif 3.8MB]
Tuesday, May 6th
Jerzy Lewandowski, Warszaw
PDF [85K] of the slides
Audio [.mp3 6MB]
Tuesday, April 22nd
Carlo Rovelli, Marseille
PDF [122k] of the slides
Audio [.mp3 10MB]
Tuesday, April 8th
Laurent Freidel, Perimeter Institute
PDF [10M] of the slides
Audio [.aif 1MB]
Audio [.mp3 89MB, complete]
Tuesday, Mar 25th
Kristina Giesel, Albert Einstein Institute
PDF [1.3M] of the slides
Audio [.aif 3MB]
Audio [.wav 34MB, complete]
Tuesday, Feb 19th
Victor Taveras, PennState
PDF [380k] of the slides
Audio [.mp3 7MB] of the slides
Tuesday, Feb 5th
Kirill Krasnov, University of Nottingham
PDF [177k] of the slides
Audio [.mp3 10MB]
Tuesday, Jan 22nd
Madhavan Varadarajan, Raman Research Institute
PDF [1.5M] of the slides
Audio [.aif 4MB]
Audio [.mp3 10MB, complete]
2007
Tuesday, Nov 27th
Kevin Vandersloot, Portsmouth
PDF [150K] of the slides
Audio [.wav 35MB]
Audio [.aif 3.8MB]
Audio [.mp3 9MB, complete]
Tuesday, Nov 13th
Garrett Lisi, FQXi
PDF [2MB] of the slides
alternate PDF [8MB] of the slides
Audio [.wav 30MB]
Audio [.aif 3MB]
Audio [.mp3 7MB, complete]
Tuesday, Oct 30
Dan Christensen, UWO
PDF [600KB] of the slides
Tuesday, Oct 16
David Sloan, PennState
PDF [260KB] of the slides
Audio [.mp3 8MB]
Audio [.aif 4MB]
of the slides
Tuesday, Sep 18th (at 9:15 AM US Central time)
Jonathan Engle, Marseille
PDF [260KB] of the slides
Audio [.wav 42MB]
Audio [.aif 4MB]
Tuesday, Sep 4th (at 9:15 AM US Central time)
Johannes Tambornino, Aachen
PDF [860KB] of the slides
Audio [.wav 38MB]
Audio [.aif 4MB]
Tuesday, May 15th
Laurent Freidel, Perimeter Institute
PDF [10MB] of the slides
Audio [.mp3 65MB]
Audio [.aif 6MB]
Tuesday, April 24th
Martin Bojowald, PennState
PDF [420K] of the slides
Audio [.mp3 12MB]
Audio [.aif 6MB]
Tuesday, April 10th
Jose Antonio Zapata, UNAM Morelia
PDF [ 370kb] of the slides
Audio [.mp3 53MB]
Audio [.aif 4MB]
Tuesday, April 3rd
Lee Smolin, Perimeter Institute
PDF of the slides [5.5MB]
Audio [.mp3 56MB]
Audio [.aif 5MB]
Tuesday, March 27th
Jorge Pullin, Louisiana State
PDF of the slides [2MB]
Audio [.wav 26MB]
Audio [.aif 5MB]
Tuesday, March 20th
Kirill Krasnov, Perimeter Institute
PDF of the slides [128k]
Audio [.aif 6MB]
Audio [.wav 4MB]
Tuesday, March 13th
Michele Arzano, Perimeter Institute
Audio [.aif, 8MB]
Audio [.wav, 4MB]
Tuesday, March 6th
Alejandro Corichi, UNAM Morelia
PDF of the slides [190k]
Audio [.aif, 8MB]
The relation between the ordinary Schroedinger representation and the
so-called polymer representation will be explored. We will show how
the polymer representation can be obtained as an appropriate limit of
the Schroedinger one, and how we can recover this one by means of a
precise renormalization procedure of the polymer quantum
mechanics. Some examples will be discussed.
Tuesday February 27th
Abhay Ashtekar, PennState
PDF [105K] of the slides
Audio [.wav, 39MB]
Audio [.aif, 4MB]
Tuesday February 20th
Martin Bojowald, PennState
PDF [420K] of the slides
[there were problems with the audio, talk will be repeated 4/21]
Tuesday February 13th
Radu Roiban, PennState
Audio [.wav, 38MB]
Audio [.aif, 4MB]
2006
Tuesday November 28th
Bianca Dittrich, Perimeter Institute
Audio [.wav, 29MB]
Audio [.aif, 3MB]
Title:
Approximate observables
Tuesday November 7th
Alex Corichi, UNAM Morelia
Title:
Quantum Isolated Horizons: The Planck regime
Audio [.wav, 33MB]
Audio [.aif, 3MB]
Tuesday November 7th
Winston Fairbairn, Ecole Normale Lyon
Title:
Matter in quantum BF theory
Audio [.wav, 34MB]
Audio [.aif, 3MB]
Tuesday October 31st.
Guillermo Mena Marugan, CSIC, Madrid, Spain
Title:
Inhomogeneous quantum cosmology: the Gowdy T3 model
Audio [.wav, 38MB]
Audio [.aif, 4MB]
Tuesday October 17th.
Robert Oeckl, UNAM Morelia
Title:
Quantum gravity, probabilities and general boundaries
Audio [.wav, 41MB]
Audio [.aif, 4MB]
Tuesday October 10th.
Fernando Barbero, CSIC, Madrid
Title:
Perturbative treatment of 2+1 gravity with scalars
Audio [.wav, 31MB]
Audio [.aif, 3MB]
Simone Speziale, Perimeter Institute
Title: Graviton propagator from loop quantum gravity II
Audio [.wav, 40MB]
Audio [.aif, 4MB]
Tuesday September 26th.
Carlo Rovelli, CPT Marseille
Title: Graviton propagator from loop quantum gravity
Audio [.wav, 44MB]
Audio [.aif, 4.6MB]
Abhay Ashtekar, PennState
Title:
Loop quantum gravity frequently asked questions
Audio [.wav, 33MB]
Audio [.aif, 3MB]
This is based on the MG11 invited talk
Frank Saueressig, Utrecht
Title:
Renormalization group improved cosmologies
Audio [.wav, 33MB]
Audio [.aif, 3MB]
Title:
Renormalization group improved cosmologies
Abstract:
It is generally believed that in the very early universe, at times smaller
than the Planck time, quantum gravity effects play a crucial role. Since the
physics in the Planck era prepares the initial conditions for the subsequent
classical evolution of the universe it is desirable to gain some
understanding of the quantum gravitational processes which took place
immediately after the Big Bang. Based on the Einstein-Hilbert approximation
of asymptotically safe quantum gravity we discuss a consistent
renormalization group based framework which allows for the inclusion of such
quantum gravitational effects into the cosmological field equations and
applies to all stages of the cosmological evolution. The very early universe
is found to contain a period of "oscillatory inflation". Lateron the
cosmological evolution is classical and asymtotes to a de Sitter era at
cosmologically late times.
Andrzej Okolow, Warszaw
Title: Quantization of diffeomorphism invariant theories of connections
with a non-compact structure group --- an example
Audio [.wma, 33MB]
Audio [.wav, 48MB]
Audio [.aif, 3.5MB]
A simple diffeomorphism invariant theory of connections with the
non-compact structure group R of real numbers is quantized. The theory
is defined on a four-dimensional 'space-time' by an action resembling
closely the self-dual Plebanski action for general relativity. The space
of quantum states is constructed by means of projective techniques by
Kijowski. Except this point the applied quantization procedure
is based on Loop Quantum Gravity methods.
Tuesday June 13th.
No talk.
Parampreet Singh (PennState).
Title: The Big Bang and Loop Quantum Cosmology
Audio [.wav, 35MB]
Audio [.aif, 3.7MB] of the talk
of the talk
The talk deals with the recent developments in homogeneous and
isotropic loop quantum cosmology on the Planck scale physics near the Big
Bang. By constructing the physical Hilbert space, Dirac observables
and physical semi-classical states definite and robust predictions
about quantum nature of big bang can be made. The analysis leads to
a prediction that the current, classical, expanding phase of the Universe
is deterministically joined to a contracting phase by a quantum
gravitational bridge. Quantum geometric effects at Planck scales make
gravity replusive replacing big bang singularity with a big bounce.
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