In Schwarzschild spacetime, the late-time thermalization of an Unruh-DeWitt detector is described by quantum relative entropy, whose evolution depends on the chosen vacuum and shows faster consumption of quantum coherence than classical Kullback-Leibler divergence.
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Relative entropy formulation of thermalization process in a Schwarzschild spacetime
In Schwarzschild spacetime, the late-time thermalization of an Unruh-DeWitt detector is described by quantum relative entropy, whose evolution depends on the chosen vacuum and shows faster consumption of quantum coherence than classical Kullback-Leibler divergence.