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SUMMARY:Solid Adiabatic Modes and Soft Theorems - Sadra Jazayeri (Universi
 ty of Cambridge)
DTSTART:20181130T130000Z
DTEND:20181130T140000Z
UID:TALK112510@talks.cam.ac.uk
CONTACT:Nathan Johnson-McDaniel
DESCRIPTION:Cosmological observations\, from the cosmic microwave backgrou
 nd to large-scale structure\, indicate that the initial condition for inho
 mogeneities in our universe has been adiabatic\, namely\, in the long wave
 length limit\, any perturbation in our universe locally mimics a coordinat
 e change.\n\nI first review the concept of adiabatic modes\; I demonstrate
  two empirical consequences of adiabaticity: conservation of the curvature
  perturbation and soft theorems for single field inflation. \n\n\nAdiabati
 c modes for perfect fluids and scalar fields have been extensively studied
  in the literature. In this talk\, I investigate a solid coupled to gravit
 y\; I study its adiabatic modes and their corresponding soft theorems. Alt
 hough almost every deformation in a solid—even in the long wavelength li
 mit—is non-adiabatic\, I will show that a solid exhibits infinitely many
  adiabatic modes.
LOCATION:Pavilion B Potter Room (B1.19)
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