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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-4772
DTSTART:20180315T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260310T213710Z
LAST-MODIFIED:20180302T143225Z
LOCATION:5280 Chamberlin Hall
SUMMARY:De Sitter from D3-branes?\, Theory Seminar (High Energy/Cosmol
 ogy)\, Ander Retolaza\, DESY Theory Group
DESCRIPTION:If de Sitter vacua exist in string theory compactications
  is an unanswered question. All attempts to realize such vacua are bas
 ed on 4D eeffective field theory descriptions. The standard procedur
 e to construct them first deals with moduli stabilization\, generical
 ly leading to anti de Sitter space\, and then adds a localized source 
 which increases the vacuum energy while leaving the stabilization unto
 uched\, typically an anti-D3-brane on a warped throat. These 4D ideas 
 conflict with higher dimensional results telling that<br>
\nin warped 
 compactications one needs to include some object that violates the st
 rong energy condition to obtain 4D de Sitter.<br>
\nIn this talk I wil
 l provide a 10D description of a popular 4D construction to obtain de 
 Sitter and show that the 4D effective field theory misses a crucial 
 point when trying to uplift the vacuum energy above zero. Then\, I wil
 l apply this knowledge to other models in the market.
URL:https://www.physics.wisc.edu/events/?id=4772
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