Dephasing and Kerr type interaction effects in circuit quantum electrodynamics

ORAL

Abstract

There has been recently a significant advance in obtaining high quality factor resonators in superconducting circuit architectures. The reduction of the resonator line width motivates us to consider subtle Kerr type interaction effects in small clusters of cavities and transmon type qubits. The Kerr interaction leads to entanglement of cavities, which in the transient regime is manifested in collapse-revival dynamics. For longer time scales, the interaction of the system with its environment becomes important and we discuss how the entangled states are modified. The signal of this steady-state Kerr interaction is a multi-photon port-to-port scattering process which can be observed in homodyne measurements or in a spectral analysis (correlations). We discuss the relevance of these effects to the challenge of building quantum memories.

–

Authors

  • Eran Ginossar

    Advanced Technology Institute and Department of Physics, University of Surrey, Physics Department, University of Surrey

  • Steven Girvin

    Department of Physics, Yale University, Yale University, Physics Department Yale University, Physics Department, Yale University, Departments of Physics and Applied Physics, Yale University, New Haven, Connecticut 06520, USA