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Paper detail

Time-delayed quantum coherent Pyragas feedback control of photon squeezing in a degenerate parametric oscillator

Quantum coherent feedback control is a measurement-free control method fully preserving quantum coherence. In this paper we show how time-delayed quantum coherent feedback can be used to control the degree of squeezing in the output field of a cavity containing a degenerate parametric oscillator. We focus on the specific situation of Pyragas-type feedback control where time-delayed signals are fed back directly into the quantum system. Our results show how time-delayed feedback can enhance or decrease the degree of squeezing as a function of time delay and feedback strength.

preprint2016arXivOpen access
Manuel KraftSven Moritz HeinJudith LehnertEckehard SchöllStephen HughesAndreas Knorr
quant-ph
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Manuel KraftSven Moritz HeinJudith LehnertEckehard SchöllStephen HughesAndreas Knorr

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