70 citations · 954 across the 45 of their papers we have counts for
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hep-th2013★ 24 cited
Master equation for the Unruh-DeWitt detector and the universal relaxation time in de Sitter space
Masafumi Fukuma, Yuho Sakatani, Sotaro Sugishita
We derive the master equation that completely determines the time evolution of the density matrix of the Unruh-DeWitt detector in an arbitrary background geometry. We apply the equ…
hep-th2013★ 28 cited
Propagators in de Sitter space
Masafumi Fukuma, Yuho Sakatani, Sotaro Sugishita
In a spacetime with no global timelike Killing vector, we do not have a natural choice for the vacuum state of matter fields, leading to an ambiguity in defining the Feynman propag…