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

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

1999-02-24

arxiv.org/abs/quant-ph/9902077v1

Phys.Rev. A60 (1999) 1549-1561

Physics

Quantum Physics

RevTeX, 18 pages, 5 figures

Scientific paper

10.1103/PhysRevA.60.1549

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.

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