Qubit Motion as a Microscopic Model for the Dynamical Casimir Effect
arXiv:2011.02822 · doi:10.1103/PhysRevA.103.062201
Abstract
The generation of photons from the vacuum by means of the movement of a mirror is known as the dynamical Casimir effect (DCE). In general, this phenomenon is effectively described by a field with time-dependent boundary conditions. Alternatively, we consider a microscopic model of the DCE capable of reproducing the effect with no time-dependent boundary conditions. Besides the field, such a model comprises a subsystem modeling the mirror's internal structure. In this work, we study the most straightforward system for the mirror: a qubit moving in a cavity and coupled to one of the bosonic modes. We find that under certain conditions on the qubit's movement that do not depend on its physical properties, a large number of photons may be generated without changing the qubit state, as should be expected for a microscopic model of the mirror.
arXiv commentMain text: 4 pages, 4 figures. Appendices: 5 pages, 5 figures
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