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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Positivity in EFTs with spontaneously broken boosts
DTSTART:20221121T140000
DTEND:20221121T150000
DTSTAMP:20260408T034254Z
UID:54e34cdb0f3581aa357294cd14ff387c441023645e3f7087240290c2
CATEGORIES:Conferences - Seminars
DESCRIPTION:Oliver Janssen (ICTP)\nI will discuss positivity bounds on EF
 T coefficients in theories where Lorentz boosts are spontaneously broken.
  The well-known S-matrix argument from the Lorentz-invariant scenario does
  not straightforwardly generalize to this case. Instead the analytic prope
 rties of the retarded Green’s function of conserved currents (or of the 
 stress-energy tensor) will be used\, and the theory will be assumed to bec
 ome conformal in the UV. The method is general and applicable to both cosm
 ology and condensed matter systems. As a concrete example we will consider
  the EFT of conformal superfluids\, which describes the universal low-ener
 gy dynamics of CFTs at large U(1) charge\, and we will derive inequalities
  on the coefficients of the operators\, in three spacetime dimensions\, at
  NLO and NNLO.
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727
STATUS:CONFIRMED
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