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DTSTART:20070311T020000
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DTSTAMP:20240328T105925
DTSTART;TZID=America/Detroit:20240412T150000
DTEND;TZID=America/Detroit:20240412T160000
SUMMARY:Lecture / Discussion:HET Seminar | On Causality Conditions in de Sitter Spacetime
DESCRIPTION:Causality conditions provide powerful constraints on low energy theories.  In this talk\, I will discuss how standard causality conditions of AdS and flat spacetimes can be extended to de Sitter spacetime.  In particular\, I will consider the Shapiro time delay experienced by a particle in a black hole or shockwave background and discuss how \"fastest null geodesics\" can be defined using spatial shifts on the boundary of de Sitter and the relevance of the \"stretching\" of the de Sitter Penrose diagram.  I will discuss a few illustrative examples.
UID:117228-21838851@events.umich.edu
URL:https://events.umich.edu/event/117228
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:High Energy Theory Seminar,Physics
LOCATION:West Hall - 335
CONTACT:
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