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SUMMARY:RG Flows and Bounds from Chaos
DTSTART:20210510T140000
DTEND:20210510T150000
DTSTAMP:20260408T101843Z
UID:123ea58bceaf9af0cc8c53c55658bde981c298d6a51884325f4e1022
CATEGORIES:Conferences - Seminars
DESCRIPTION:Sandipan Kundu (Johns Hopkins)\nI will discuss a precise conne
 ction between renormalization group (RG) and quantum chaos. Every RG flow
  between two conformal fixed points can be described in terms of the dy
 namics of Nambu-Goldstone bosons of broken symmetries. The theory of Namb
 u-Goldstone bosons can be viewed as a theory in anti-de Sitter space with 
 the flat space limit. This enables an equivalent formulation of these 4d R
 G flows in terms of spectral deformations of a generalized free CFT in 3d.
  This approach provides a precise relation between C-functions associated
  with 4d RG flows and certain out-of-time-order correlators that diagnose
  chaos in 3d. As an application\, I will show that the 3d chaos bound impo
 ses constraints on the low energy effective action associated with unitar
 y RG flows in 4d with a broken continuous global symmetry in the UV. The
 se bounds\, among other things\, imply that the proof of the 4d a-theorem 
 remains valid even when additional global symmetries are broken. \n 
LOCATION:zoom https://epfl.zoom.us/j/83475832843?pwd=OS9kSTRQS0g3K1JuQTQyV
 nZqUkYwQT09
STATUS:CONFIRMED
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