Abstract
We studied the quantization of the electromagnetic field between moving boundaries in four dimensional spacetime. We considered the particular case of a field confined between two infinite conducting plates moving with constant relative velocity [1]. This motion produces a distortion of vacuum that can be interpreted as “particle production” . The work necessary is done at the expense of the Casimir energy of the system [2]. We evaluated the energy momentum tensor and its spectrum from the field correlations. We have also found that a vacuum or coherent state between the plates becomes squeezed. Analytic formulas for the Bogolubov and the squeezing coefficients [3] have been obtained. We analyzed the interaction of the “emitted photons” with a realistic quantum detector [4] and we have come to the conclusion that there is no spontaneous excitation of the detector. However, the spontaneous decay ratio shows strong oscillations as compared with the free case.
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