Dissipative dynamics of circuit-QED in the mesoscopic regime
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We investigate the behavior of a circuit QED device when the resonator is initially populated with a mesoscopic coherent field. The strong coupling between the cavity and the qubit produces an entangled state involving mesoscopic quasi-pointer states with respect to cavity dissipation. The overlap of the associated field components results in collapses and revivals for the Rabi oscillation. Although qubit relaxation and dephasing do not preserve these states, a simple analytical description of the dissipative dynamics of the circuit QED device including cavity relaxation as well as qubit dissipation is obtained from the Monte-Carlo approach. Explicit predictions for the spontaneous and induced Rabi oscillation signals are derived and successfully compared with exact calculations. We show that these interesting effects could be observed with a 10 photon field in forthcoming circuit QED experiments.
PACS.42.50.Pq Cavity quantum electrodynamics; micromasers 03.65.Yz Decoherence; open systems; quantum statistical methods 42.50.Dv Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements 85.25.-j Superconducting devices
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- O. Buisson, F. Hekking, in Macroscopic quantum coherence and computing (Kluwer Academic Plenum Publishers New-York, 2001) p. 137 Google Scholar