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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:2
UID:UW-Physics-Event-9512
DTSTART:20260427T180000Z
DTEND:20260427T193000Z
DTSTAMP:20260513T145058Z
LAST-MODIFIED:20260427T192310Z
LOCATION:Chamberlin 5280
SUMMARY:No Shift\, Sherlock: No Shift Symmetries in AdS/CFT\, Theory S
 eminar (High Energy/Cosmology)\, José Calderón-Infante\, Caltech
DESCRIPTION:The absence of global symmetries is a long-standing conjec
 ture about quantum gravity. In this talk\, I will focus on continuous 
 global shift symmetries in AdS/CFT\, with the goal of developing a CFT
 -based argument against them. First\, I will discuss how a shift symme
 try in the bulk is reflected on the boundary CFT. This raises the ques
 tion of whether local\, unitary CFT can exhibit such property. I will 
 present an argument that\, under a certain assumption\, rules out this
  possibility. Then\, I will introduce some CFTs that do not satisfy th
 is assumption and argue that this leads to an exotic type of shift sym
 metry gauging in the bulk. A key role will be played by the CFT stress
  tensor\, which is dual to the graviton in the bulk. To see how theori
 es without gravity avoid our argument\, I will describe how it fails i
 n the boundary theory of a massless free scalar in AdS\, namely the ge
 neralized free field theory of a marginal operator. Finally\, if time 
 permits\, I will address whether this type of argument could lead to a
  bound on how much the shift symmetry must be broken. Event recording:
  https://youtu.be/kc0nepsZInA
URL:https://www.physics.wisc.edu/events/?id=9512
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