Astrophysics

Displaying 1321 - 1332 of 2125

Eternal Inflation and it's Implications

Alan Guth Massachusetts Institute of Technology (MIT) - Department of Physics
July 12, 2011

PIRSA:11070034
Astrophysics
Overview of the Challenges

Neil Turok University of Edinburgh
July 12, 2011

PIRSA:11070044
Astrophysics
What is the state of the early Universe

Samir Mathur Ohio State University
July 08, 2011

PIRSA:11070003
Astrophysics
Lessons from an exactly solved interacting quantum field theory in de Sitter spacetime

Denjoe O'Connor Dublin Institute for Advanced Studies
June 28, 2011

PIRSA:11060092
Astrophysics
Concluding Remarks

Leonard Susskind Stanford University
June 24, 2011

PIRSA:11060076
Astrophysics
Bubble Popper

Simeon Hellerman University of Tokyo
June 24, 2011

PIRSA:11060052
Astrophysics
Correlation functions in FRW/CFT duality

Yasuhiro Sekino
June 24, 2011

PIRSA:11060060
Astrophysics
A Canonical Measure for Inflation

Neil Turok University of Edinburgh
June 24, 2011

PIRSA:11060073
Astrophysics
Challenges in Cosmology

Willy Fischler The University of Texas at Austin
June 24, 2011

PIRSA:11060049
Astrophysics
A toy model of quantum gravity in cosmological spacetimes

Mark Van Raamsdonk University of British Columbia
June 24, 2011

PIRSA:11060058
Astrophysics
Complexity in Fundamental Physics

Frederik Denef Katholieke Universiteit Leuven
June 23, 2011

PIRSA:11060070
Astrophysics
Liouville theory and Holographic Cosmology

Daniel Lord Harlow Massachusetts Institute of Technology (MIT) - Center for Theoretical Physics
June 23, 2011

PIRSA:11060050
Astrophysics

Eternal Inflation and it's Implications

Alan Guth Massachusetts Institute of Technology (MIT) - Department of Physics
July 12, 2011

PIRSA:11070034
Astrophysics
TBA
Overview of the Challenges

Neil Turok University of Edinburgh
July 12, 2011

PIRSA:11070044
Astrophysics
What is the state of the early Universe

Samir Mathur Ohio State University
July 08, 2011

PIRSA:11070003
Astrophysics
String theory should give a well-defined answer to the following question: What is the state of matter in the limit of infinite energy density? We use results obtained from the understanding of black hole entropy to conjecture this equation of state, noting that the maximum entropy state in string theory has vastly more entropy than the states used in traditional approaches to early Universe Cosmology. The evolution of the Universe with this equation of state can be obtained in closed form.
Lessons from an exactly solved interacting quantum field theory in de Sitter spacetime

Denjoe O'Connor Dublin Institute for Advanced Studies
June 28, 2011

PIRSA:11060092
Astrophysics
It is argued that the correct quantization of a scalar field theory in de Sitter spacetime involves a de Sitter invariant state which is not the Bunch-Davies vacuum. A novel but natural de Sitter invariant alternative exists and it is suggested that this and is the prefered state for scalar field theories. The argument is based on the exact solution of an interacting scalar field theory.
Concluding Remarks

Leonard Susskind Stanford University
June 24, 2011

PIRSA:11060076
Astrophysics
Bubble Popper

Simeon Hellerman University of Tokyo
June 24, 2011

PIRSA:11060052
Astrophysics
In the context of the AdS/CFT correspondence, I will discuss model-independent properties shared by bulk theories of gravity with consistent dual descriptions. I will then discuss the prospects of extending these ideas to non-conformal theories, in particular to attempts to realize cosmological theories holographically. I will address the status of in-principle falsifiability of various holographic proposals through internal consistency conditions of the boundary theory.
Correlation functions in FRW/CFT duality

Yasuhiro Sekino
June 24, 2011

PIRSA:11060060
Astrophysics
FRW/CFT duality is a proposal for a holographic dual description for universe created by bubble nucleation. For (3+1) dimensional universe, the dual theory is defined on 2-sphere at the boundary of open universe. I will study correlation functions and explain essential features of FRW/CFT duality: One bulk field corresponds to a tower of CFT operators The boundary theory contains 2D gravity, and the Liouville field plays the role of time. Energy-momentum tensor has dimension 2, as required from the 2D conformal symmetry.
A Canonical Measure for Inflation

Neil Turok University of Edinburgh
June 24, 2011

PIRSA:11060073
Astrophysics
Challenges in Cosmology

Willy Fischler The University of Texas at Austin
June 24, 2011

PIRSA:11060049
Astrophysics
An attempt at describing some of the shortcomings in our present understanding of cosmology.
A toy model of quantum gravity in cosmological spacetimes

Mark Van Raamsdonk University of British Columbia
June 24, 2011

PIRSA:11060058
Astrophysics
In this talk, I attempt to gain insight into the description of quantum gravity on cosmological spacetimes by considering the physics of families of accelerating observers in spacetimes which admit non-perturbative descriptions vis AdS/CFT.
Complexity in Fundamental Physics

Frederik Denef Katholieke Universiteit Leuven
June 23, 2011

PIRSA:11060070
Astrophysics
Liouville theory and Holographic Cosmology

Daniel Lord Harlow Massachusetts Institute of Technology (MIT) - Center for Theoretical Physics
June 23, 2011

PIRSA:11060050
Astrophysics
I will explain how Liouville theory with complex values of its parameters arises naturally in speculative holographic cosmologies. We will encounter Liouville theory of both the ``spacelike'' and ``timelike'' variety. I will then use this as motivation to present some new results on the analytic continuation of Liouville theory recently obtained with Maltz and Witten.

Title	Speaker(s)	Date	Talk Type	Info link
Eternal Inflation and it's Implications	Alan Guth	2011-07-12	Conference	View details
Overview of the Challenges	Neil Turok	2011-07-12	Conference	View details
What is the state of the early Universe	Samir Mathur	2011-07-08	Scientific Series	View details
Lessons from an exactly solved interacting quantum field theory in de Sitter spacetime	Denjoe O'Connor	2011-06-28	Scientific Series	View details
Concluding Remarks	Leonard Susskind	2011-06-24	Conference	View details
Bubble Popper	Simeon Hellerman	2011-06-24	Conference	View details
Correlation functions in FRW/CFT duality	Yasuhiro Sekino	2011-06-24	Conference	View details
A Canonical Measure for Inflation	Neil Turok	2011-06-24	Conference	View details
Challenges in Cosmology	Willy Fischler	2011-06-24	Conference	View details
A toy model of quantum gravity in cosmological spacetimes	Mark Van Raamsdonk	2011-06-24	Conference	View details
Complexity in Fundamental Physics	Frederik Denef	2011-06-23	Conference	View details
Liouville theory and Holographic Cosmology	Daniel Lord Harlow	2011-06-23	Conference	View details

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Format results

Eternal Inflation and it's Implications

Overview of the Challenges

What is the state of the early Universe

Lessons from an exactly solved interacting quantum field theory in de Sitter spacetime

Concluding Remarks

Bubble Popper

Correlation functions in FRW/CFT duality

A Canonical Measure for Inflation

Challenges in Cosmology

A toy model of quantum gravity in cosmological spacetimes

Complexity in Fundamental Physics

Liouville theory and Holographic Cosmology

Eternal Inflation and it's Implications

Overview of the Challenges

What is the state of the early Universe

Lessons from an exactly solved interacting quantum field theory in de Sitter spacetime

Concluding Remarks

Bubble Popper

Correlation functions in FRW/CFT duality

A Canonical Measure for Inflation

Challenges in Cosmology

A toy model of quantum gravity in cosmological spacetimes

Complexity in Fundamental Physics

Liouville theory and Holographic Cosmology