Photon generation via dynamical Casimir effect in an optomechanical cavity as a closed quantum system
arXiv:1910.10218 · doi:10.1103/PhysRevA.100.062516
Abstract
We present an analytical and numerical analysis of the particle creation in an optomechanical cavity in parametric resonance. We treat both the electromagnetic field and the mirror as quantum degrees of freedom and study the dynamical evolution as a closed quantum system. We consider different initial states and investigate the spontaneous emission of photons from phonons in the mirror. We find that for initial phononic product states the evolution of the photon number can be described as a non-harmonic quantum oscillator, providing an useful tool so as to estimate the maximum and mean number of photons produced for arbitrary high energies. The efficiency of this mechanism is further analyzed for a detuned cavity as well as the possibility of stimulating the photon production by adding some initial ones to the cavity. We also find relationships for the maximum and mean entanglement between the mirror and the wall in these states. Additionally we study coherent states for the motion of the mirror to connect this model with previous results from quantum field theory with a classical mirror. Finally we study thermal states of phonons in the wall and the equilibration process that leads to a stationary distribution.
arXiv comment12 pages, 10 figures
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Cited by in corpus (4)
- Interplay between optomechanics and the dynamical Casimir effect
- Hybrid coupling optomechanically assisted nonreciprocal photon blockade
- Entanglement degradation of cavity modes due to the dynamical Casimir effect
- Dynamics and Spectral Response of linear-quadratic optomechanical interaction: Effects of pure dephasing