Challenges for Early Universe Cosmology - 2011

34 talks

July 12, 2011 - July 16, 2011

C11008

Collection Type Conference/School

Description Challenges for Early Universe Cosmology

Displaying 1 - 12 of 34

Overview of the Challenges

Neil Turok University of Edinburgh
July 12, 2011
PIRSA:11070044
Cosmology
Eternal Inflation and it's Implications

Alan Guth Massachusetts Institute of Technology (MIT) - Department of Physics
July 12, 2011
PIRSA:11070034
Cosmology
Is Eternal Inflation in Our Past?

Ben Freivogel Universiteit van Amsterdam
July 12, 2011
PIRSA:11070035
Cosmology
Holographic Cosmology Part 1

Willy Fischler The University of Texas at Austin
July 12, 2011
PIRSA:11070014
Cosmology
First observational tests of eternal inflation

Hiranya Peiris University of Cambridge
July 12, 2011
PIRSA:11070008
Cosmology
On Slow Roll Eternal Inflation

Leonardo Senatore SLAC National Accelerator Laboratory
July 12, 2011
PIRSA:11070043
Cosmology
Cosmic Bubble Collisions

Matthew Kleban New York University (NYU) - Center for Cosmology and Particle Physics
July 12, 2011
PIRSA:11070037
Cosmology
Bringing Terminal Vacua Back to Life With Classical Transitions

Matthew Johnson York University
July 12, 2011
PIRSA:11070016
Cosmology
Eternal Inflation in the Light of Quantum Cosmology

James Hartle University of California, Santa Barbara
July 13, 2011
PIRSA:11070015
Cosmology
The Measure Problem: Successes and Challenges

Raphael Bousso University of California System
July 13, 2011
PIRSA:11070032
Cosmology
Boundary Theory and the Measure Problem

Jaume Garriga Universitat de Barcelona
July 13, 2011
PIRSA:11070038
Cosmology
Does the Cyclic Universe Avoid the Measure Problem?

Jean-Luc Lehners Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI) - Theoretical Cosmology
July 13, 2011
PIRSA:11070028
Cosmology

Overview of the Challenges

Neil Turok University of Edinburgh
July 12, 2011
PIRSA:11070044
Cosmology
Eternal Inflation and it's Implications

Alan Guth Massachusetts Institute of Technology (MIT) - Department of Physics
July 12, 2011
PIRSA:11070034
Cosmology
TBA
Is Eternal Inflation in Our Past?

Ben Freivogel Universiteit van Amsterdam
July 12, 2011
PIRSA:11070035
Cosmology
TBA
Holographic Cosmology Part 1

Willy Fischler The University of Texas at Austin
July 12, 2011
PIRSA:11070014
Cosmology
We will describe how a quantum mechanical description of a flat FRW with equation of state pressure =energy density, emerges.
First observational tests of eternal inflation

Hiranya Peiris University of Cambridge
July 12, 2011
PIRSA:11070008
Cosmology
The eternal inflation scenario predicts that our observable universe resides inside a single bubble embedded in a vast inflating multiverse. Collisions between bubble universes imprinted in the CMB sky provide a powerful observational test of this idea. I will describe a robust algorithm for non-Gaussian source detection in massive datasets, and present its application to the search for bubble collision signatures in CMB data from WMAP.
On Slow Roll Eternal Inflation

Leonardo Senatore SLAC National Accelerator Laboratory
July 12, 2011
PIRSA:11070043
Cosmology
Cosmic Bubble Collisions

Matthew Kleban New York University (NYU) - Center for Cosmology and Particle Physics
July 12, 2011
PIRSA:11070037
Cosmology
TBA
Bringing Terminal Vacua Back to Life With Classical Transitions

Matthew Johnson York University
July 12, 2011
PIRSA:11070016
Cosmology
In this talk, I will describe how the collision of Minkowski or crunching bubbles can re-start inflation in a portion of the bubble interior. Consistent with various singularity theorems, such collisions can only seed a lasting inflationary phase with energy density lower than that of the parent vacuum.
Eternal Inflation in the Light of Quantum Cosmology

James Hartle University of California, Santa Barbara
July 13, 2011
PIRSA:11070015
Cosmology
If the universe is a quantum mechanical system it has a quantum state. This state supplies a probabilistic measure for alternative histories of the universe. During eternal inflation these histories typically develop large inhomogeneities that lead to a mosaic structure on superhorizon scales consisting of homogeneous patches separated by inflating regions. As observers we do not see this structure directly. Rather our observations are confined to a small, nearly homogeneous region within our past light cone. This talk will describe how the probabilities for these observations can be calculated from the probabilities supplied by the quantum state without introducing a further ad hoc measure.
The Measure Problem: Successes and Challenges

Raphael Bousso University of California System
July 13, 2011
PIRSA:11070032
Cosmology
Boundary Theory and the Measure Problem

Jaume Garriga Universitat de Barcelona
July 13, 2011
PIRSA:11070038
Cosmology
TBA
Does the Cyclic Universe Avoid the Measure Problem?

Jean-Luc Lehners Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI) - Theoretical Cosmology
July 13, 2011
PIRSA:11070028
Cosmology
In its best understood version, the Steinhardt-Turok cyclic universe contains two crucial ingredients: an unstable field trajectory during the ekpyrotic phase, and the subsequent brane collision corresponding to the crunch/bang transition. These two features act as strong selection principles and determine the broad physical properties of the universe emerging from the bang. As such, they significantly alleviate (and perhaps resolve) the measure problem that is inherent to all cosmological models that produce universes with a range of physical properties.

Title	Speaker(s)	Date	Talk Type	Info
Overview of the Challenges	Neil Turok	2011-07-12	Conference	View details
Eternal Inflation and it's Implications	Alan Guth	2011-07-12	Conference	View details
Is Eternal Inflation in Our Past?	Ben Freivogel	2011-07-12	Conference	View details
Holographic Cosmology Part 1	Willy Fischler	2011-07-12	Conference	View details
First observational tests of eternal inflation	Hiranya Peiris	2011-07-12	Conference	View details
On Slow Roll Eternal Inflation	Leonardo Senatore	2011-07-12	Conference	View details
Cosmic Bubble Collisions	Matthew Kleban	2011-07-12	Conference	View details
Bringing Terminal Vacua Back to Life With Classical Transitions	Matthew Johnson	2011-07-12	Conference	View details
Eternal Inflation in the Light of Quantum Cosmology	James Hartle	2011-07-13	Conference	View details
The Measure Problem: Successes and Challenges	Raphael Bousso	2011-07-13	Conference	View details
Boundary Theory and the Measure Problem	Jaume Garriga	2011-07-13	Conference	View details
Does the Cyclic Universe Avoid the Measure Problem?	Jean-Luc Lehners	2011-07-13	Conference	View details

Challenges for Early Universe Cosmology - 2011

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