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SUMMARY:Ioanna Kourkoulou (Columbia University)
DTSTART:20210414T160000Z
DTEND:20210414T170000Z
DTSTAMP:20260423T005649Z
UID:CMU-TP/32
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CMU-TP/32/">
 Lorentz invariance in Framids as a potential technical analog of the CCP</
 a>\nby Ioanna Kourkoulou (Columbia University) as part of Carnegie Mellon 
 theoretical physics\n\n\nAbstract\nThe Framid is a hypothetical system who
 se ground state spontaneously breaks boost symmetry\, however its stress-e
 nergy tensor retains a Lorentz-invariant expectation value on the ground s
 tate\, as we verify explicitly to one-loop order. The mechanism enforcing 
 this result is rather obscure\; in fact\, we think this puzzle is an inter
 esting technical analog of the cosmological constant problem. I will descr
 ibe our computations that verify the Lorentz invariance of the expectation
  value in question\, and how these yield the expected result only thanks t
 o highly nontrivial cancellations\, which are quite mysterious from the lo
 w-energy effective theory viewpoint.\n
LOCATION:https://researchseminars.org/talk/CMU-TP/32/
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