| The generation of photons by vacuum disturbance is known as the dynamical Casimir effect(DCE),which is the most powerful proof of quantum vacuum fluctuations.It was first proposed in theory in 1970.Wilson et al.realized the experimental observation of the dynamical Casimir effect in the transmission line of the superconducting waveguide terminated by the superconducting quantum interferometric device(SQUID)in 2011.It shows that the effective motion induced by modulating of the external magnetic flux produces the photon pairs in the initial quasi-vacuum state.Moreover,the photons display the properties of quantum entanglement and quantum discord.Theoretical studies have shown that quantum correlations can be measured even in the thermal bath.It allows us to quantify non-classical features of the dynamical Casimir effect,which can be converted into superconducting qubit to produce highly entangled qubit states.Therefore,it is of particular importance to study in more detail how to use DCE to generate other useful quantum properties.Based on the study of dynamical Casimir effect in the two models of one-dimensional semi-infinite superconducting waveguide and two superconducting waveguides connected by superconducting quantum interference rings,the quantum synchronization effect of the Casimir photons generated in the system after considering dissipation is further studied according to the quantum synchronization criterion proposed by Mari et al.It is shown that the Casimir photons generated in the two systems can achieve quantum synchronization,and the effects of discordance,temperature,coupling coefficient and normalized coefficient on the quantum synchronization level are discussed by numerical analysis. |
PDF Full Text Request