Dynamical Casimir effect in superconducting microwave circuits

摘要: We theoretically investigate the dynamical Casimir effect (DCE) in electrical circuits based on superconducting microfabricated waveguides with tunable boundary conditions. propose implementing a rapid modulation of conditions by tuning applied magnetic flux through quantum-interference devices that are embedded waveguide circuits. consider two circuits: (i) An open circuit corresponds to single mirror free space, and (ii) resonator coupled waveguide, which single-sided cavity space. analyze properties DCE these setups calculating generated photon-flux densities, output-field correlation functions, quadrature squeezing spectra. show output field exhibit signatures unique radiation due DCE, could, therefore, be used for distinguishing from other types also discuss similarities differences between setup, down-conversion pump photons parametric oscillators.