Photon generation and entanglement in a double superconducting cavity

We study the dynamical Casimir effect in a double superconducting cavity circuit quantum electrodynamics architecture. Parameters are chosen such way can mimic cavity, formed by two perfectly conducting outer walls and dielectric one, with arbitrary permittivity separating both halves. undertake spectral analysis of showing that spectrum varies significantly depending on values susceptibility mirror relative lengths cavities. creation photons when oscillate harmonically small amplitude. Furthermore, we explore possibility entangling uncoupled cavities, starting from symmetric having its halves become at later given instant. consider cases: (i) field is initially vacuum state (ii) situation which photon via has already taken place. show cavities entangled cases but, latter, correlation between individual modes be greatly increased cost diminishing entanglement most pairs modes.