Non-Markovian quantum feedback from homodyne measurements: the effect of a non-zero feedback delay time

Abstract

We solve exactly the non-Markovian dynamics of a cavity mode in the presence of a feedback loop based on homodyne measurements, in the case of a non-zero feedback delay time. With an appropriate choice of the feedback parameters, this scheme is able to significantly increase the decoherence time of the cavity mode, even for delay times not much smaller than the decoherence time itself.

RevTeX, 18 pages, 5 figures

References in corpus (5)

• Non-Markovian Quantum State Diffusion
• Optomechanical Cooling of a Macroscopic Oscillator by Homodyne Feedback
• Fluorescence into flat and structured radiation continua: An atomic density matrix without a master equation
• Quantum State Protection in Cavities
• Linear quantum trajectories: Applications to continuous projection measurements

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