PIRSA Logo


PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Sean Gryb


PIRSA:17050055  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum singularity resolution in homogeneous cosmology and the implications for shape dynamics
Speaker(s): Sean Gryb
Abstract: I will present results on the quantization of an FRLW model that utilises a Schrodinger-type evolution equation. In contrast to standard Wheeler--DeWitt-type quantisations, the quantum model resolves the classical singularity, exhibits a quantum bounce, and displays novel early-universe phenomenolog... read more
Date: 17/05/2017 - 2:00 pm

PIRSA:16060119  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Preferred Global Slicing
Speaker(s): Chopin Soo, Sean Gryb
Abstract:
Date: 30/06/2016 - 2:00 pm
Collection: Time in Cosmology

PIRSA:15060052  ( MP4 Medium Res , MP3 , PDF ) Which Format?
What is Shape Dynamics?
Speaker(s): Sean Gryb
Abstract:
Date: 26/06/2015 - 9:00 am

PIRSA:13070044  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Shape Dynamics - 2
Abstract:
Date: 22/07/2013 - 4:40 pm
Collection: Loops 13

PIRSA:12050069  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
2+1 gravity as a conformal gauge theory and some frontiers for Shape Dynamics
Speaker(s): Sean Gryb
Abstract: I will start by showing that gravity, with positive cosmological constant in 2+1 dimensions, can be formulated as a theory of dynamic conformal spatial geometry. Exploiting the isomorphism between the isometry group of de Sitter space in D+1 dimensions and the conformal group in D dimensions, I will... read more
Date: 10/05/2012 - 11:10 am

PIRSA:10120052  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Local scale invariance as an alternative to Lorentz invariance
Speaker(s): Sean Gryb
Abstract: I will present a recent result showing that general relativity admits a dual description in terms of a 3D scale invariant theory. The dual theory was discovered by starting with the basic observation that, fundamentally, all observations can be broken down into local comparisons of spatial configura... read more
Date: 01/12/2010 - 11:30 am

PIRSA:09080061  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Problems with Dynamical Quantum Spacetime.
Speaker(s): Sean Gryb
Abstract: A discussion of the properties of the dynamics of spacetime and how certain aspects of the relational dynamics lead to difficulties in the quantum theory.
Date: 11/08/2009 - 4:00 pm
Collection: ISSYP 2009

PIRSA:09080058  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Special Topic: Our World as a Hologram?
Speaker(s): Richard Epp, Sean Gryb
Abstract: Our universe has a split personality: quantum and relativity. Understanding how the two can coexist, i.e. how our universe can exist, is one of the greatest challenges facing theoretical physicists in the 21st century. The presentation focuses on a simple but mind-bending thought experiment that hin... read more
Date: 10/08/2009 - 4:00 pm
Collection: ISSYP 2009

PIRSA:09040030  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 9
Abstract:
Date: 22/04/2009 - 10:30 am

PIRSA:09040029  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 8
Abstract:
Date: 15/04/2009 - 10:30 am

PIRSA:09040014  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 7
Abstract:
Date: 01/04/2009 - 10:30 am

PIRSA:09030044  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 6
Abstract:
Date: 25/03/2009 - 10:30 am

PIRSA:09030042  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 5
Abstract:
Date: 11/03/2009 - 10:30 am

PIRSA:09030020  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 4
Abstract:
Date: 04/03/2009 - 10:30 am

PIRSA:09020032  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 3
Abstract:
Date: 25/02/2009 - 10:30 am

PIRSA:09020030  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle - Lecture 2
Abstract:
Date: 11/02/2009 - 10:30 am

PIRSA:09020029  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mini-Course on Mach's Principle
Abstract:
Date: 04/02/2009 - 10:30 am

PIRSA:08040038  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Emergent Time in Barbour and Bertotti's Timeless Mechanics
Speaker(s): Sean Gryb
Abstract: The problem of time is studied in a toy model for quantum gravity: Barbour and Bertotti's timeless formulation of non-relativistic mechanics. We quantize this timeless theory using path integrals and compare it to the path integral quantization of parameterized Newtonian mechanics, which contains ab... read more
Date: 10/04/2008 - 2:00 pm

PIRSA:07090008  ( MP4 Medium Res , MP3 , PDF ) Which Format?
(2+1) Gravity and Chern-Simons Theory.
Speaker(s): Sean Gryb
Abstract: In the late 80s it became clear through notable work by Witten and others that there is a deep connection between (2+1) gravity and Chern-Simons theory making it possible to quantize. In the case where the cosmological constant is negative, spacetime has a boundary and classically there are black ho... read more
Date: 07/09/2007 - 12:00 pm
Valid XHTML 1.0!