35 citations · 89 across the 15 of their papers we have counts for
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math-ph2016★ 5 cited
On the Hartle-Hawking-Israel states for spacetimes with static bifurcate Killing horizons
Christian Gérard
We revisit the construction by Sanders [S1] of the Hartle-Hawking-Israel state for a free quantum Klein-Gordon field on a spacetime with a static, bifurcate Killing horizon and a w…
math-ph2016★ 4 cited
Feynman propagators and Hadamard states from scattering data for the Klein-Gordon equation on asymptotically Minkowski spacetimes
Christian Gérard, Michal Wrochna
We consider the massive Klein-Gordon equation on a class of asymptotically static spacetimes. We prove the existence and Hadamard property of the in and out states constructed by s…