In this paper, we investigate a Josephson-junction device with dichotomous resistance or a special SQUID(superconducting quantum interference device). It is shown that frequency(stochastic) resonance and stochastic re...In this paper, we investigate a Josephson-junction device with dichotomous resistance or a special SQUID(superconducting quantum interference device). It is shown that frequency(stochastic) resonance and stochastic resonance can appear for some suitably selected parameters' values of the device respectively. Our results can provide some insights for the investigation of the SQUID response to the signal(including the input alternating current, the added alternating voltage, the vertically added alternating magnetic field, and the detected(electric-magnetic) temporal-periodic signal).展开更多
We investigate the possibility of observing in integrated solid-state systems the dynamical Casimir effect,in which photons are created out of vacuum.We use a transmission line resonator on a superconducting chip as t...We investigate the possibility of observing in integrated solid-state systems the dynamical Casimir effect,in which photons are created out of vacuum.We use a transmission line resonator on a superconducting chip as the microwave cavity and modulate its properties by coupling it to carefully designed Josephson devices.We evaluate the effect of main decoherence sources and show that our design offers a promising system for experimentally demonstrating the dynamical Casimir effect.Moreover,we also study the squeezing properties of the created photon field and how they depend on the dissipation.展开更多
基金Supported by national natural science foundation of China under Grant No.10975079Supported by K.C.Wong Magna Fund of Ningbo University in China
文摘In this paper, we investigate a Josephson-junction device with dichotomous resistance or a special SQUID(superconducting quantum interference device). It is shown that frequency(stochastic) resonance and stochastic resonance can appear for some suitably selected parameters' values of the device respectively. Our results can provide some insights for the investigation of the SQUID response to the signal(including the input alternating current, the added alternating voltage, the vertically added alternating magnetic field, and the detected(electric-magnetic) temporal-periodic signal).
基金supported by the National Natural Science Foundation of China(Grant No.11174270)the National Basic Research Program of China(Grant Nos.2011CB921204 and 2011CBA00200)+1 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB01000000)ZHOU Zheng Wei gratefully acknowledges the support of theK.C.Wong Education Foundation,Hong Kong
文摘We investigate the possibility of observing in integrated solid-state systems the dynamical Casimir effect,in which photons are created out of vacuum.We use a transmission line resonator on a superconducting chip as the microwave cavity and modulate its properties by coupling it to carefully designed Josephson devices.We evaluate the effect of main decoherence sources and show that our design offers a promising system for experimentally demonstrating the dynamical Casimir effect.Moreover,we also study the squeezing properties of the created photon field and how they depend on the dissipation.
