Broadening the high sensitivity range of squeezing-assisted interferometers by means of two-channel detection
arXiv:2010.05276 · doi:10.1364/OE.413391
Abstract
For a squeezing-enhanced SU(2) interferometer, we theoretically investigate the possibility to broaden the phase range of sub-shot-noise sensitivity. We show that this goal can be achieved by implementing detection in both output ports, with the optimal combination of the detectors outputs, leading to a phase sensitivity independent of the interferometer operation point. Provided that each detector is preceded by a phase-sensitive amplifier, this sensitivity could be also tolerant to the detection loss.
arXiv comment11 pages, 2 figures
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