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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Stefano Liberati


PIRSA:14060002  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Gravity, an unexpected journey: from thermodynamics to emergent gravity, Lorentz breaking and back...
Speaker(s): Stefano Liberati
Abstract: Thermodynamical aspects of gravity have been a tantalising puzzle for more than forty years now and are still at the center of much activity in semiclassical and quantum gravity. We shall explore the possibility that they might hint toward an emergent nature of gravity exploring the possible implica... read more
Date: 19/06/2014 - 2:30 pm

PIRSA:14060000  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Analogue Models of Gravity: The ubiquitous space-time
Speaker(s): Stefano Liberati
Abstract: Analogies have played a very important role in physics and mathematics, as they provide new ways of looking at problems that permit cross-fertilization of ideas among different branches of science. An analogue gravity model is a generic dynamical system (typically but not always based on condensed m... read more
Date: 18/06/2014 - 2:00 pm
Series: Colloquium

PIRSA:12100108  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Lorentz symmetry: Broken, intact or deformed?
Abstract: Is aether technically natural?I will discuss whether higher energy Lorentz violation should be considered a natural expectation in theories of quantum gravity with a preferred frame._____________________________If spacetime is a causal set then Lorentz symmetry is unbroken___________________________... read more
Date: 24/10/2012 - 3:30 pm

PIRSA:12100082  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Is there a MesoScale in Quantum Gravity? Is it a Non-Locality Scale?
Abstract:
Date: 22/10/2012 - 2:00 pm

PIRSA:12100080  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
An analogue model lesson for the cosmological constant
Speaker(s): Stefano Liberati
Abstract: Analogue models of gravity have been a test field for many phenomena in quantum field theory on curved spacetimes.  It was recently recognized that in some situations they can also provide toy models of emergent gravity.  We shall review here such a model and address within it the ... read more
Date: 22/10/2012 - 11:35 am

PIRSA:11050010  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The emergent gravity challenge: a few lessons from analogue gravity
Speaker(s): Stefano Liberati
Abstract: Emergent gravity scenarios have become increasingly popular in recent times. In this talk I will review some evidence in this sense and discuss some lessons from toy models based on condensed matter analogues of gravity. These lessons suggest some (possibly) general features of the emergent gravity ... read more
Date: 04/05/2011 - 4:00 pm
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