Back-action from Unruh-DeWitt detectors produces energy fluxes that exactly account for detector transitions due to the Unruh effect, including negative energy density regions near the Rindler horizon and in the far future for ground-state accelerated detectors.
(B.3) If the detector is nondegenerate, E̸ = 0, linear in- dependence of the set {e±iE(τ+τ ′), e±iE(τ−τ ′)} implies that Cov(σ−, σ−) = Cov(σ−, σ+) = Cov(σ+, σ−) = Cov(σ+, σ+) = 0
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Back-action from inertial and non-inertial Unruh-DeWitt detectors revisited in covariant perturbation theory
Back-action from Unruh-DeWitt detectors produces energy fluxes that exactly account for detector transitions due to the Unruh effect, including negative energy density regions near the Rindler horizon and in the far future for ground-state accelerated detectors.