Talks

8617 - 8628 of 20132 Results

Bounce in Loop Quantum Cosmology and its Implications

Abhay Ashtekar Pennsylvania State University

June 26, 2017

PIRSA:17060095

Astrophysics
Welcome and Opening Remarks

Steffen Gielen University of Sheffield

Neil Turok University of Edinburgh

June 26, 2017

PIRSA:17060094

Astrophysics
The Universal Renormalization Group Machine - 2

Frank Saueressig Radboud Universiteit Nijmegen

June 23, 2017

PIRSA:17060092

General Relativity & Quantum Cosmology
The Universal Renormalization Group Machine - 1

Frank Saueressig Radboud Universiteit Nijmegen

June 23, 2017

PIRSA:17060091

General Relativity & Quantum Cosmology
Numerical loop quantum cosmology

Parampreet Singh Louisiana State University

June 23, 2017

PIRSA:17060090

General Relativity & Quantum Cosmology
Numerical loop quantum cosmology

Parampreet Singh Louisiana State University

June 23, 2017

PIRSA:17060089

General Relativity & Quantum Cosmology
Quantum Gravity from Lattice Gauge Theory via Holography

Masanori Hanada Kyoto University

June 22, 2017

PIRSA:17060088

General Relativity & Quantum Cosmology
Tutorial: Coarse-graining of Spin Foams

Benjamin Bahr Universität Hamburg

Bianca Dittrich Perimeter Institute for Theoretical Physics

Sebastian Steinhaus Friedrich Schiller University Jena

June 22, 2017

PIRSA:17060087

General Relativity & Quantum Cosmology
Tutorial: Monte Carlo methods in Dynamical Triangulations

Timothy Budd Radboud Universiteit Nijmegen

Joren Brunekreef Radboud Universiteit Nijmegen

June 22, 2017

PIRSA:17060086

General Relativity & Quantum Cosmology
Intrinsic Non-commutativity of Closed Strings

Rob Leigh University of Illinois Urbana-Champaign

June 22, 2017

PIRSA:17060093

High Energy Physics

General Relativity & Quantum Cosmology
Coarse-graining of Spin Foams - 4

Benjamin Bahr Universität Hamburg

Bianca Dittrich Perimeter Institute for Theoretical Physics

June 22, 2017

PIRSA:17060085

General Relativity & Quantum Cosmology
Coarse-graining of Spin Foams - 3

Benjamin Bahr Universität Hamburg

Bianca Dittrich Perimeter Institute for Theoretical Physics

June 22, 2017

PIRSA:17060084

General Relativity & Quantum Cosmology

Bounce in Loop Quantum Cosmology and its Implications

Abhay Ashtekar Pennsylvania State University

June 26, 2017

PIRSA:17060095

Astrophysics

There is a huge body of work in Loop Quantum Cosmology comprising of several thousand journal articles. I will provide an overview of conclusions, focusing on the difficult conceptual and mathematical issues that accompany the notion of a bounce and opening the way for phenomenological implications that will be discussed by Ivan Agullo.
Welcome and Opening Remarks

Steffen Gielen University of Sheffield

Neil Turok University of Edinburgh

June 26, 2017

PIRSA:17060094

Astrophysics
The Universal Renormalization Group Machine - 2

Frank Saueressig Radboud Universiteit Nijmegen

June 23, 2017

PIRSA:17060092

General Relativity & Quantum Cosmology

Functional renormalization group techniques based on Wetterichs equation provide a powerful tool for studying the properties of gravity in the quantum regime and its connection to the observable low-energy world. Explicit computations in this framework require the evaluation of functional traces over operator-valued functions. In these lectures I will give a pedagogical introduction to the Universal Renormalization Group Machine, a combinatorial algorithm which allows evaluating such traces in a systematic way. Moreover, I will discuss flow equations for “composite operators” which may pave the route towards developing a microscopic description of quantum spacetime within the Asymptotic Safety approach.
The Universal Renormalization Group Machine - 1

Frank Saueressig Radboud Universiteit Nijmegen

June 23, 2017

PIRSA:17060091

General Relativity & Quantum Cosmology

Functional renormalization group techniques based on Wetterichs equation provide a powerful tool for studying the properties of gravity in the quantum regime and its connection to the observable low-energy world. Explicit computations in this framework require the evaluation of functional traces over operator-valued functions. In these lectures I will give a pedagogical introduction to the Universal Renormalization Group Machine, a combinatorial algorithm which allows evaluating such traces in a systematic way. Moreover, I will discuss flow equations for “composite operators” which may pave the route towards developing a microscopic description of quantum spacetime within the Asymptotic Safety approach.
Numerical loop quantum cosmology

Parampreet Singh Louisiana State University

June 23, 2017

PIRSA:17060090

General Relativity & Quantum Cosmology

In the last decade various cosmological spacetimes have been quantized using the techniques of loop quantum gravity. To understand singularity resolution and decipher reliable Planck scale physics, development of new numerical methods and usage of high performance computing is critical in loop quantum cosmology. In recent years, these developments have robustly demonstrated resolution of singularities in quantum spacetimes. These methods have provided detailed understanding of the emergence of new physics at Planck scale, and of classicality when spacetime curvature becomes very small. Further, they have validated an effective spacetime description of the underlying quantum geometry -- a key ingredient of phenomenological predictions in loop quantum cosmology. These lectures will introduce these numerical methods.
Numerical loop quantum cosmology

Parampreet Singh Louisiana State University

June 23, 2017

PIRSA:17060089

General Relativity & Quantum Cosmology

In the last decade various cosmological spacetimes have been quantized using the techniques of loop quantum gravity. To understand singularity resolution and decipher reliable Planck scale physics, development of new numerical methods and usage of high performance computing is critical in loop quantum cosmology. In recent years, these developments have robustly demonstrated resolution of singularities in quantum spacetimes. These methods have provided detailed understanding of the emergence of new physics at Planck scale, and of classicality when spacetime curvature becomes very small. Further, they have validated an effective spacetime description of the underlying quantum geometry -- a key ingredient of phenomenological predictions in loop quantum cosmology. These lectures will introduce these numerical methods.
Quantum Gravity from Lattice Gauge Theory via Holography

Masanori Hanada Kyoto University

June 22, 2017

PIRSA:17060088

General Relativity & Quantum Cosmology

The gauge/gravity duality relates supersymmetric gauge theories to superstring/M-theory. Powerful Monte Carlo methods developed in lattice QCD can be applied to study the former,and from the simulation data we can extract the quantum gravitational effects. In this talk I will give a brief introduction to lattice gauge theory and supersymmetry on a lattice, and show some applications to quantum gravity via the gauge/gravity duality.
Tutorial: Coarse-graining of Spin Foams

Benjamin Bahr Universität Hamburg

Bianca Dittrich Perimeter Institute for Theoretical Physics

Sebastian Steinhaus Friedrich Schiller University Jena

June 22, 2017

PIRSA:17060087

General Relativity & Quantum Cosmology
Tutorial: Monte Carlo methods in Dynamical Triangulations

Timothy Budd Radboud Universiteit Nijmegen

Joren Brunekreef Radboud Universiteit Nijmegen

June 22, 2017

PIRSA:17060086

General Relativity & Quantum Cosmology
Intrinsic Non-commutativity of Closed Strings

Rob Leigh University of Illinois Urbana-Champaign

June 22, 2017

PIRSA:17060093

High Energy Physics

General Relativity & Quantum Cosmology

Abstract TBA
Coarse-graining of Spin Foams - 4

Benjamin Bahr Universität Hamburg

Bianca Dittrich Perimeter Institute for Theoretical Physics

June 22, 2017

PIRSA:17060085

General Relativity & Quantum Cosmology
Coarse-graining of Spin Foams - 3

Benjamin Bahr Universität Hamburg

Bianca Dittrich Perimeter Institute for Theoretical Physics

June 22, 2017

PIRSA:17060084

General Relativity & Quantum Cosmology

Title	Date	Collection	Type	Info
Bounce in Loop Quantum Cosmology and its Implications	2017‑06‑26	Bounce Scenarios in Cosmology	Conference	View details
Welcome and Opening Remarks	2017‑06‑26	Bounce Scenarios in Cosmology	Conference	View details
The Universal Renormalization Group Machine - 2	2017‑06‑23	Making Quantum Gravity Computable	Conference	View details
The Universal Renormalization Group Machine - 1	2017‑06‑23	Making Quantum Gravity Computable	Conference	View details
Numerical loop quantum cosmology	2017‑06‑23	Making Quantum Gravity Computable	Conference	View details
Numerical loop quantum cosmology	2017‑06‑23	Making Quantum Gravity Computable	Conference	View details
Quantum Gravity from Lattice Gauge Theory via Holography	2017‑06‑22	Making Quantum Gravity Computable	Conference	View details
Tutorial: Coarse-graining of Spin Foams	2017‑06‑22	Making Quantum Gravity Computable	Conference	View details
Tutorial: Monte Carlo methods in Dynamical Triangulations	2017‑06‑22	Making Quantum Gravity Computable	Conference	View details
Intrinsic Non-commutativity of Closed Strings	2017‑06‑22	Strong Gravity	Scientific Series	View details
Coarse-graining of Spin Foams - 4	2017‑06‑22	Making Quantum Gravity Computable	Conference	View details
Coarse-graining of Spin Foams - 3	2017‑06‑22	Making Quantum Gravity Computable	Conference	View details

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Format results

Bounce in Loop Quantum Cosmology and its Implications

Welcome and Opening Remarks

The Universal Renormalization Group Machine - 2

The Universal Renormalization Group Machine - 1

Numerical loop quantum cosmology

Numerical loop quantum cosmology

Quantum Gravity from Lattice Gauge Theory via Holography

Tutorial: Coarse-graining of Spin Foams

Tutorial: Monte Carlo methods in Dynamical Triangulations

Intrinsic Non-commutativity of Closed Strings

Coarse-graining of Spin Foams - 4

Coarse-graining of Spin Foams - 3

Bounce in Loop Quantum Cosmology and its Implications

Welcome and Opening Remarks

The Universal Renormalization Group Machine - 2

The Universal Renormalization Group Machine - 1

Numerical loop quantum cosmology

Numerical loop quantum cosmology

Quantum Gravity from Lattice Gauge Theory via Holography

Tutorial: Coarse-graining of Spin Foams

Tutorial: Monte Carlo methods in Dynamical Triangulations

Intrinsic Non-commutativity of Closed Strings

Coarse-graining of Spin Foams - 4

Coarse-graining of Spin Foams - 3