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SUMMARY:Notes on quantum fields in Static patch of de Sitter space
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20240618T223826Z
UID:indico-contribution-289@mosphys.ru
DESCRIPTION:Speakers: Kirill Bazarov (MIPT)\nWe show the explicit mode exp
ansion of tree-level propagators in Static (or Compact) Patch of de Sitter
space. We construct propagator for thermal state corresponding to arbitra
ry temperature $T$. We show that the propagator that respects the de Sitte
r isometry corresponds to the thermal state with $T = (2 \\pi)^{-1}$ in th
e units of de Sitter curvature. Which confirms the old and well known resu
lt\, making it a bit more explicit. Propagators with $T\\ne(2\\pi)^{-1}$ d
o not respect the isometry. Moreover\, we show that propagators with $T \\
neq (2 \\pi)^{-1}$ have extra singularities on the boundary of the Static
Patch\, as opposed to the case of $T = (2 \\pi)^{-1}$. We discuss physical
meaning of these observations.\nWe also discuss loop corrections to the p
ropagators in the Static patch and their physical meaning both for $T = (2
\\pi)^{-1}$ and $T \\neq (2 \\pi)^{-1}$.\n\nhttps://rich2018.org/indico/e
vent/5/contributions/289/
LOCATION:HSE Study Center “Voronovo”
URL:https://rich2018.org/indico/event/5/contributions/289/
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