Conference

Displaying 2953 - 2964 of 4981

Quantum Cosmology - 1
- Jonathan Engle Aix-Marseille University
- 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 Le Mans Université
July 22, 2013

PIRSA:13070042
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
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
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
A Quantum Gravity Extension of the Infationary Scenario

Ivan Agullo Louisiana State University

July 22, 2013

PIRSA:13070035
Opening Remarks

Neil Turok University of Edinburgh

July 22, 2013

PIRSA:13070093
Cosmological Consistency Relations as Ward Identities

July 11, 2013

PIRSA:13070016
Strings in Compact Cosmological Spaces

Ben Craps Vrije Universiteit Brussel

July 11, 2013

PIRSA:13070019
How much information is there in large scale structure?

July 11, 2013

PIRSA:13070018

Quantum Cosmology - 1
- Jonathan Engle Aix-Marseille University
- 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 Le Mans Université
July 22, 2013

PIRSA:13070042
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
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
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.
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.
Opening Remarks

Neil Turok University of Edinburgh

July 22, 2013

PIRSA:13070093
Cosmological Consistency Relations as Ward Identities

July 11, 2013

PIRSA:13070016
Strings in Compact Cosmological Spaces

Ben Craps Vrije Universiteit Brussel

July 11, 2013

PIRSA:13070019

A formalism is proposed for perturbative string theory in spacetimes with totally compact space (and non-compact time).
How much information is there in large scale structure?

July 11, 2013

PIRSA:13070018

Large scale structure contains vastly more Fourier modes than the CMB, and is therefore a promising arena for studying the early universe. One obstacle to using these modes is the non-linearity of structure formation. The amount of weakly coupled information available is therefore very sensitive to scale at which non-linear effects become important and simulations become necessary. Using effective field theory techniques, I will present evidence that the perturbative description of dark matter is much better behaved than previously thought. I will discuss the implications for improving constraints on non-gaussian initial conditions.

Title	Speaker(s)	Date	Talk Type	Info link
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
Shape Dynamics - 1	Matteo Giuseppe Lostaglio, Tim Koslowski, Julian Barbour, Karim Thebault, Flavio Mercati	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: A Status Report	Henrique Gomes	2013-07-22	Conference	View details
Quantum Gravity Phenomenology with Neutrinos and High Energy Photons	Dafne Guetta	2013-07-22	Conference	View details
Some Possible Ways to Observe Consequences of Loop Quantum Gravity	Aurelien Barrau	2013-07-22	Conference	View details
A Quantum Gravity Extension of the Infationary Scenario	Ivan Agullo	2013-07-22	Conference	View details
Opening Remarks	Neil Turok	2013-07-22	Conference	View details
Cosmological Consistency Relations as Ward Identities		2013-07-11	Conference	View details
Strings in Compact Cosmological Spaces	Ben Craps	2013-07-11	Conference	View details
How much information is there in large scale structure?		2013-07-11	Conference	View details

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Format results

Quantum Cosmology - 1

Black Holes - 1

Shape Dynamics - 1

Spin Foams - 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

A Quantum Gravity Extension of the Infationary Scenario

Opening Remarks

Cosmological Consistency Relations as Ward Identities

Strings in Compact Cosmological Spaces

How much information is there in large scale structure?

Quantum Cosmology - 1

Black Holes - 1

Shape Dynamics - 1

Spin Foams - 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

A Quantum Gravity Extension of the Infationary Scenario

Opening Remarks

Cosmological Consistency Relations as Ward Identities

Strings in Compact Cosmological Spaces

How much information is there in large scale structure?