Talks

12349 - 12360 of 19958 Results

Black Holes in Loop Quantum Gravity: New Insights and Perspectives from Semiclassical Consistency

July 23, 2013

PIRSA:13070047
Shape Dynamics - 2

Sean Gryb University of Groningen

Vasudev Shyam Stealth Startup

Jeffrey Hazboun Utah State University

Niayesh Afshordi University of Waterloo

July 22, 2013

PIRSA:13070044
Quantum Cosmology - 2

Julien Grain University of Paris-Saclay

Linda Linsefors Laboratoire de Physique Subatomique et de Cosmologie (LPSC Grenoble)

Andrea Dapor University of Warsaw

Edward Wilson-Ewing University of New Brunswick

July 22, 2013

PIRSA:13070043
Black Holes - 2

Yuki Yokokura RIKEN

Kinjalk Lochan Tata Institute of Fundamental Research (TIFR)

Jorge Pullin Louisiana State University

Matteo Smerlak Capital Fund Management S.A.

July 22, 2013

PIRSA:13070046
Spin Foams - 2

Giorgio Immirzi National Institute for Nuclear Physics

Aleksander Mikovic Lusofona University

Jeff Hnybida Irréversible Inc

Wolfgang Wieland University of Erlangen-Nuremberg

July 22, 2013

PIRSA:13070045
Spin Foams - 1

Wojciech Kaminski University of Warsaw

Aldo Riello Perimeter Institute for Theoretical Physics

Simone Speziale Aix-Marseille University

Sebastian Steinhaus Friedrich Schiller University Jena

July 22, 2013

PIRSA:13070041
Black Holes - 1

Antony Lee University of Nottingham

Laurent Freidel Perimeter Institute for Theoretical Physics

Christopher Coleman-Smith Duke University

Antonin Coutant Le Mans Université

July 22, 2013

PIRSA:13070042
Quantum Cosmology - 1

Jonathan Engle Aix-Marseille University

Steffen Gielen University of Sheffield

Emanuele Alesci Pennsylvania State University

July 22, 2013

PIRSA:13070039
Shape Dynamics - 1

Matteo Giuseppe Lostaglio Imperial College London

Tim Koslowski Technical University of Applied Sciences Würzburg-Schweinfurt

Julian Barbour University of Oxford

Karim Thebault Ludwig-Maximilians-Universität München (LMU)

Flavio Mercati University of Naples Federico II

July 22, 2013

PIRSA:13070040
Shape Dynamics: A Status Report

Henrique Gomes University of Oxford

July 22, 2013

PIRSA:13070038
Quantum Gravity Phenomenology with Neutrinos and High Energy Photons

Dafne Guetta ORT Braude College

July 22, 2013

PIRSA:13070037
Some Possible Ways to Observe Consequences of Loop Quantum Gravity

Aurelien Barrau Laboratoire de Physique Subatomique et de Cosmologie (LPSC Grenoble)

July 22, 2013

PIRSA:13070036

Black Holes in Loop Quantum Gravity: New Insights and Perspectives from Semiclassical Consistency

July 23, 2013

PIRSA:13070047

I will argue that the recently introduced quasilocal framework for black hole mechanics (based on the form of the near horizon geometry of stationary black holes (BHs)) together with an additional assumption on the degeneracy of the area spectrum in quantum gravity (holography for non geometric degrees of freedom) leads to agreement between the statistical mechanical treatment of quantum black holes and standard semiclassical results in BH thermodynamics. More precisely, up to small quantum corrections, quantum black holes satisfy the following properties: Entropy is Bekenstein-Hawking entropy, and fluctuations of the horizon area are small. Moreover, under the above assumption, an explicit correspondence between the statistical mechanical treatment of the fundamental LQG degrees of freedom and the semiclassical Euclidean path integral formulation can be explicitly established.
Shape Dynamics - 2

Sean Gryb University of Groningen

Vasudev Shyam Stealth Startup

Jeffrey Hazboun Utah State University

Niayesh Afshordi University of Waterloo

July 22, 2013

PIRSA:13070044
Quantum Cosmology - 2

Julien Grain University of Paris-Saclay

Linda Linsefors Laboratoire de Physique Subatomique et de Cosmologie (LPSC Grenoble)

Andrea Dapor University of Warsaw

Edward Wilson-Ewing University of New Brunswick

July 22, 2013

PIRSA:13070043
Black Holes - 2

Yuki Yokokura RIKEN

Kinjalk Lochan Tata Institute of Fundamental Research (TIFR)

Jorge Pullin Louisiana State University

Matteo Smerlak Capital Fund Management S.A.

July 22, 2013

PIRSA:13070046
Spin Foams - 2

Giorgio Immirzi National Institute for Nuclear Physics

Aleksander Mikovic Lusofona University

Jeff Hnybida Irréversible Inc

Wolfgang Wieland University of Erlangen-Nuremberg

July 22, 2013

PIRSA:13070045
Spin Foams - 1

Wojciech Kaminski University of Warsaw

Aldo Riello Perimeter Institute for Theoretical Physics

Simone Speziale Aix-Marseille University

Sebastian Steinhaus Friedrich Schiller University Jena

July 22, 2013

PIRSA:13070041
Black Holes - 1

Antony Lee University of Nottingham

Laurent Freidel Perimeter Institute for Theoretical Physics

Christopher Coleman-Smith Duke University

Antonin Coutant Le Mans Université

July 22, 2013

PIRSA:13070042
Quantum Cosmology - 1

Jonathan Engle Aix-Marseille University

Steffen Gielen University of Sheffield

Emanuele Alesci Pennsylvania State University

July 22, 2013

PIRSA:13070039
Shape Dynamics - 1

Matteo Giuseppe Lostaglio Imperial College London

Tim Koslowski Technical University of Applied Sciences Würzburg-Schweinfurt

Julian Barbour University of Oxford

Karim Thebault Ludwig-Maximilians-Universität München (LMU)

Flavio Mercati University of Naples Federico II

July 22, 2013

PIRSA:13070040
Shape Dynamics: A Status Report

Henrique Gomes University of Oxford

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 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.
Some Possible Ways to Observe Consequences of Loop Quantum Gravity

Aurelien Barrau Laboratoire de Physique Subatomique et de Cosmologie (LPSC 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.

Title	Date	Collection	Type	Info
Black Holes in Loop Quantum Gravity: New Insights and Perspectives from Semiclassical Consistency	2013‑07‑23	Loops 13	Conference	View details
Shape Dynamics - 2	2013‑07‑22	Loops 13	Conference	View details
Quantum Cosmology - 2	2013‑07‑22	Loops 13	Conference	View details
Black Holes - 2	2013‑07‑22	Loops 13	Conference	View details
Spin Foams - 2	2013‑07‑22	Loops 13	Conference	View details
Spin Foams - 1	2013‑07‑22	Loops 13	Conference	View details
Black Holes - 1	2013‑07‑22	Loops 13	Conference	View details
Quantum Cosmology - 1	2013‑07‑22	Loops 13	Conference	View details
Shape Dynamics - 1	2013‑07‑22	Loops 13	Conference	View details
Shape Dynamics: A Status Report	2013‑07‑22	Loops 13	Conference	View details
Quantum Gravity Phenomenology with Neutrinos and High Energy Photons	2013‑07‑22	Loops 13	Conference	View details
Some Possible Ways to Observe Consequences of Loop Quantum Gravity	2013‑07‑22	Loops 13	Conference	View details

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Format results

Black Holes in Loop Quantum Gravity: New Insights and Perspectives from Semiclassical Consistency

Shape Dynamics - 2

Quantum Cosmology - 2

Black Holes - 2

Spin Foams - 2

Spin Foams - 1

Black Holes - 1

Quantum Cosmology - 1

Shape Dynamics - 1

Shape Dynamics: A Status Report

Quantum Gravity Phenomenology with Neutrinos and High Energy Photons

Some Possible Ways to Observe Consequences of Loop Quantum Gravity

Black Holes in Loop Quantum Gravity: New Insights and Perspectives from Semiclassical Consistency

Shape Dynamics - 2

Quantum Cosmology - 2

Black Holes - 2

Spin Foams - 2

Spin Foams - 1

Black Holes - 1

Quantum Cosmology - 1

Shape Dynamics - 1

Shape Dynamics: A Status Report

Quantum Gravity Phenomenology with Neutrinos and High Energy Photons

Some Possible Ways to Observe Consequences of Loop Quantum Gravity