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TZID:Europe/Berlin
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UID:1294@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20190614T133000
DTEND;TZID=Europe/Berlin:20190614T143000
DTSTAMP:20190611T113939Z
URL:https://qft.physik.hu-berlin.de/next-seminars/niels-obers-nbi-kopenhag
 en/
SUMMARY:Niels Obers\, NBI Kopenhagen - 
DESCRIPTION:N. Obers\, NBI\n\nTitle: "Gravity and String Theory between New
 ton and Einstein"\n\nAbstract: Newton-Cartan (NC) geometry was introduced 
 more than 90 years ago in order to find a geometric formulation of Newton
 ian gravity. This geometry (including a novel generalisation that include
 s torsion) has in recent years gained renewed interest as it appears in a
  variety of settings in modern theory involving gravity\, string theory a
 nd holography. After a brief introduction\, I will talk about recent work
  on an action principle for non-relativistic gravity\, including its Newt
 onian limit. This requires a new notion of NC geometry\, which naturally 
 arises in a covariant 1/c expansion of general relativity\, with c being 
 the speed of light. By truncating this expansion at subleading order\, we
  obtain the field content and transformation rules of the fields that app
 ear in the action of Newtonian gravity. The equations of motion generaliz
 e Newtonian gravity by allowing for the effect of gravitational time dila
 tion due to strong gravitational field. I will also discuss the relevance
  of non-relativistic geometry in connection to non-relativistric string t
 heory and holography. In particular\, I will show that non-relativistic s
 trings and geometry appear in certain limits of the the AdS/CFT correspon
 dence.
CATEGORIES:Pizza Seminars
LOCATION:Room 2'07\, IRIS Building\, Zum großen Windkanal 6\, Berlin\, Ger
 many
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DTSTART:20190331T030000
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