Dissipative dynamics of circuit-QED in the mesoscopic regime

Details Dissipative dynamics of circuit-QED in the mesoscopic regime Dissipative dynamics of circuit-QED in the mesoscopic regime

2007-04-26

arxiv.org/abs/0704.3489v1

European Physical Journal D 1, 47 (2008) 133

Physics

Quantum Physics

10 figures, 1 table

Scientific paper

10.1140/epjd/e2008-00039-9

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 collapse 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 sucessfully compared with exact calculations. We show that these interesting effects could be observed with a 10 photon field in forthcoming circuit QED experiments.

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