Loops 13

55 talks

July 22, 2013 - July 26, 2013

C13029

Collection Type Conference/School

Description Loops 13

Displaying 1 - 12 of 55

Opening Remarks

Neil Turok Perimeter Institute for Theoretical Physics

July 22, 2013 PIRSA:13070093
A Quantum Gravity Extension of the Infationary Scenario

Ivan Agullo Louisiana State University

July 22, 2013 PIRSA:13070035
Some Possible Ways to Observe Consequences of Loop Quantum Gravity

Aurelien Barrau Laboratoire de Physique Subatomique et de Cosmologie de Grenoble

July 22, 2013 PIRSA:13070036
Quantum Gravity Phenomenology with Neutrinos and High Energy Photons

Dafne Guetta ORT Braude College

July 22, 2013 PIRSA:13070037
Shape Dynamics: A Status Report

Henrique Gomes University of Cambridge

July 22, 2013 PIRSA:13070038
Quantum Cosmology - 1
- Jonathan Engle CPT Marseille
- Steffen Gielen University of Sheffield
- Emanuele Alesci Pennsylvania State University
July 22, 2013 PIRSA:13070039
Black Holes - 1
- Antony Lee University of Nottingham
- Laurent Freidel Perimeter Institute for Theoretical Physics
- Christopher Coleman-Smith Duke University
- Antonin Coutant Laboratoire d'Acoustique de l'Université du Mans (LAUM)
July 22, 2013 PIRSA:13070042
Spin Foams - 1
- Wojciech Kaminski University of Warsaw
- Aldo Riello Perimeter Institute for Theoretical Physics
- Simone Speziale Centre de Physique Théorique
- Sebastian Steinhaus Friedrich Schiller University Jena
July 22, 2013 PIRSA:13070041
Shape Dynamics - 1
- Matteo Giuseppe Lostaglio Imperial College London
- Tim Koslowski Universidad Nacional Autónoma De Mexico (UNAM)
- Julian Barbour University of Oxford
- Karim Thebault Ludwig-Maximilians-Universitiät München (LMU)
- Flavio Mercati University of Naples Federico II
July 22, 2013 PIRSA:13070040
Shape Dynamics - 2
- Sean Gryb University of Groningen
- Vasudev Shyam Stanford University
- Jeffrey Hazboun Utah State University
- Niayesh Afshordi University of Waterloo
July 22, 2013 PIRSA:13070044
Spin Foams - 2
- Giorgio Immirzi National Institute for Nuclear Physics
- Aleksander Mikovic Lusofona University
- Jeff Hnybida 1QB Information Technologies Inc. (1Qbit)
- Wolfgang Wieland University of Erlangen-Nuremberg
July 22, 2013 PIRSA:13070045
Black Holes - 2
- Yuki Yokokura RIKEN
- Kinjalk Lochan Tata Institute of Fundamental Research (TIFR)
- Jorge Pullin Louisiana State University (LSU) - Department of Physics & Astronomy
- Matteo Smerlak Max Planck Institute for Mathematics in the Sciences
July 22, 2013 PIRSA:13070046

Opening Remarks

Neil Turok Perimeter Institute for Theoretical Physics

July 22, 2013 PIRSA:13070093
A Quantum Gravity Extension of the Infationary Scenario

Ivan Agullo Louisiana State University

July 22, 2013 PIRSA:13070035

Since the standard inflationary paradigm is based on quantum field theory on classical space-times, it excludes the Planck era. Using techniques from loop quantum gravity, the theory is extended to overcome this limitations. The new framework sharpens conceptual issues by distinguishing between the true and apparent trans-Planckian difficulties and provides sufficient conditions under which the true difficulties can be overcome within a quantum gravity theory, with interesting lessons for both theory and observations.
Some Possible Ways to Observe Consequences of Loop Quantum Gravity

Aurelien Barrau Laboratoire de Physique Subatomique et de Cosmologie de Grenoble

July 22, 2013 PIRSA:13070036

In this talk, I'll briefly review some possible observational consequences of loop quantum gravity. I will first address the issue of the closure of the algebra of constraints in holonomy-corrected effective loop quantum cosmology for tensor, vector, and scalar modes. I will underline some unexpected features like a possible change of signature. The associated primordial power spectrum and the basics of the related CMB analysis will be presented. The "asymptotic silence" hypothesis will be mentioned as a promising alternative. Then, I'll address the issue of the probability for inflation and the prediction of its duration from a new perspective. Finally, I'll present some prospect about the evaporation of black holes in LQG.
Quantum Gravity Phenomenology with Neutrinos and High Energy Photons

Dafne Guetta ORT Braude College

July 22, 2013 PIRSA:13070037

I review the main properties of the Gamma Ray Bursts (GRBs) as possible sources of high energy (E>TeV) neutrinos and confirmed sources of high energy (E>GeV) photons.
I discuss the possibility to use the data of neutrino telescopes, such as IceCube and the GeV-photon telescopes, such as Fermi’s LAT, for precision tests of Einstein's Special Relativity as applied to neutrinos and photons. My focus is on possible departures from Special Relativity that can be motivated by models of quantum space-time. I observe that neutrinos which one would not associate to a GRB, when assuming a classical spacetime picture, may well be GRB neutrinos if the possibility that Lorentz invariance is broken at very high energies is taken into account. I outline how future analyses of neutrino data should be done in order to systematically test the Lorentz Invariance Violation possibility. In addition I consider the possibility that Lorentz Invariance Violation might be responsible for the spectral lags that characterize the GeV signal observed for the remarkable GRB130427A.
A comparison of these features for GRBs at different redshifts provides
some encouragement for a redshift dependence of the effects of the type expected for a quantum-spacetime interpretation, but other aspects of the analysis appear to invite the interpretation as intrinsic properties of GRBs.
Shape Dynamics: A Status Report

Henrique Gomes University of Cambridge

July 22, 2013 PIRSA:13070038

I will give an introduction to the theory of Shape Dynamics, and then comment on recent advances, obstacles and future projects.
Quantum Cosmology - 1
- Jonathan Engle CPT Marseille
- Steffen Gielen University of Sheffield
- Emanuele Alesci Pennsylvania State University
July 22, 2013 PIRSA:13070039
Black Holes - 1
- Antony Lee University of Nottingham
- Laurent Freidel Perimeter Institute for Theoretical Physics
- Christopher Coleman-Smith Duke University
- Antonin Coutant Laboratoire d'Acoustique de l'Université du Mans (LAUM)
July 22, 2013 PIRSA:13070042
Spin Foams - 1
- Wojciech Kaminski University of Warsaw
- Aldo Riello Perimeter Institute for Theoretical Physics
- Simone Speziale Centre de Physique Théorique
- Sebastian Steinhaus Friedrich Schiller University Jena
July 22, 2013 PIRSA:13070041
Shape Dynamics - 1
- Matteo Giuseppe Lostaglio Imperial College London
- Tim Koslowski Universidad Nacional Autónoma De Mexico (UNAM)
- Julian Barbour University of Oxford
- Karim Thebault Ludwig-Maximilians-Universitiät München (LMU)
- Flavio Mercati University of Naples Federico II
July 22, 2013 PIRSA:13070040
Shape Dynamics - 2
- Sean Gryb University of Groningen
- Vasudev Shyam Stanford University
- Jeffrey Hazboun Utah State University
- Niayesh Afshordi University of Waterloo
July 22, 2013 PIRSA:13070044
Spin Foams - 2
- Giorgio Immirzi National Institute for Nuclear Physics
- Aleksander Mikovic Lusofona University
- Jeff Hnybida 1QB Information Technologies Inc. (1Qbit)
- Wolfgang Wieland University of Erlangen-Nuremberg
July 22, 2013 PIRSA:13070045
Black Holes - 2
- Yuki Yokokura RIKEN
- Kinjalk Lochan Tata Institute of Fundamental Research (TIFR)
- Jorge Pullin Louisiana State University (LSU) - Department of Physics & Astronomy
- Matteo Smerlak Max Planck Institute for Mathematics in the Sciences
July 22, 2013 PIRSA:13070046

Title	Speaker(s)	Date	Talk Type	Info
Opening Remarks	Neil Turok	2013-07-22	Conference	View details
A Quantum Gravity Extension of the Infationary Scenario	Ivan Agullo	2013-07-22	Conference	View details
Some Possible Ways to Observe Consequences of Loop Quantum Gravity	Aurelien Barrau	2013-07-22	Conference	View details
Quantum Gravity Phenomenology with Neutrinos and High Energy Photons	Dafne Guetta	2013-07-22	Conference	View details
Shape Dynamics: A Status Report	Henrique Gomes	2013-07-22	Conference	View details
Quantum Cosmology - 1	Jonathan Engle, Steffen Gielen, Emanuele Alesci	2013-07-22	Conference	View details
Black Holes - 1	Antony Lee, Laurent Freidel, Christopher Coleman-Smith, Antonin Coutant	2013-07-22	Conference	View details
Spin Foams - 1	Wojciech Kaminski, Aldo Riello, Simone Speziale, Sebastian Steinhaus	2013-07-22	Conference	View details
Shape Dynamics - 1	Matteo Giuseppe Lostaglio, Tim Koslowski, Julian Barbour, Karim Thebault, Flavio Mercati	2013-07-22	Conference	View details
Shape Dynamics - 2	Sean Gryb, Vasudev Shyam, Jeffrey Hazboun, Niayesh Afshordi	2013-07-22	Conference	View details
Spin Foams - 2	Giorgio Immirzi, Aleksander Mikovic, Jeff Hnybida, Wolfgang Wieland	2013-07-22	Conference	View details
Black Holes - 2	Yuki Yokokura, Kinjalk Lochan, Jorge Pullin, Matteo Smerlak	2013-07-22	Conference	View details

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