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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
What's interesting these days (with gravity)?

Latham Boyle University of Edinburgh

July 18, 2013

PIRSA:13070033
The Dark Side of Matter

Itay Yavin McMaster University

July 17, 2013

PIRSA:13070032
Life as a Physicist
- Natalia Toro Stanford University
- Philip Schuster Stanford University
July 16, 2013

PIRSA:13070031
Can Quantum correlations be Explained Casually

Robert Spekkens Perimeter Institute for Theoretical Physics

July 15, 2013

PIRSA:13070030
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

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
What's interesting these days (with gravity)?

Latham Boyle University of Edinburgh

July 18, 2013

PIRSA:13070033
The Dark Side of Matter

Itay Yavin McMaster University

July 17, 2013

PIRSA:13070032
Life as a Physicist
- Natalia Toro Stanford University
- Philip Schuster Stanford University
July 16, 2013

PIRSA:13070031
Can Quantum correlations be Explained Casually

Robert Spekkens Perimeter Institute for Theoretical Physics

July 15, 2013

PIRSA:13070030
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	Date	Collection	Type	Info
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
A Quantum Gravity Extension of the Infationary Scenario	2013‑07‑22	Loops 13	Conference	View details
Opening Remarks	2013‑07‑22	Loops 13	Conference	View details
What's interesting these days (with gravity)?	2013‑07‑18	Strong Gravity		View details
The Dark Side of Matter	2013‑07‑17	Particle Physics		View details
Life as a Physicist	2013‑07‑16			View details
Can Quantum correlations be Explained Casually	2013‑07‑15	Quantum Foundations		View details
Cosmological Consistency Relations as Ward Identities	2013‑07‑11	Cosmological Frontiers in Fundamental Physics 2013	Conference	View details
Strings in Compact Cosmological Spaces	2013‑07‑11	Cosmological Frontiers in Fundamental Physics 2013	Conference	View details
How much information is there in large scale structure?	2013‑07‑11	Cosmological Frontiers in Fundamental Physics 2013	Conference	View details

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