https://doi.org/10.1140/epjc/s10052-023-12276-2
Regular Article - Theoretical Physics
Conditions for anti-Unruh effect
1
Department of Physics, State Key Laboratory of Surface Physics, Fudan University, 200433, Shanghai, China
2
Department of Physics, Liaoning Normal University, 116029, Dalian, China
3
Shanghai Research Center for Quantum Science, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, 201315, Shanghai, China
4
University of Science and Technology of China, 230026, Hefei, China
Received:
12
June
2023
Accepted:
21
November
2023
Published online:
6
December
2023
Conditions for anti-Unruh effect in (1+1)-dimensional spacetime are obtained. For detectors with Gaussian switching functions, the analytical results are similar to previous ones, indicating that anti-Unruh effect occurs when the energy gap matches the characteristic time scale. However, this conclusion does not hold for detectors with square wave switching functions, in which case the condition turns out to depend on both the energy gap and the characteristic time scale in some nontrivial way. We also show analytically that there is no anti-Unruh effect for detectors with Gaussian switching functions in (3+1)-dimensional spacetime.
© The Author(s) 2023
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