Phase sensitivity of two nonlinear interferometers with inputting entangled coherent states

We investigate the phase sensitivity of the SU（1,1） interfereometer [SU（1,1）I] and the modified Mach-Zehnder in- terferometer （MMZI） with the entangled coherent states （ECS） as inputs. We consider the ideal case and the situations in which the photon losses are taken into account. We find that, unde...

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Veröffentlicht in:	Chinese physics B 2016-04, Vol.25 (4), p.74-78
1. Verfasser:	魏朝平胡小玉於亚飞张智明
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Sprache:	eng
Schlagworte:	Coherence ECS Interferometers Mach-Zehnder interferometers Nonlinearity Photons 干涉仪损失比散粒噪声相位灵敏度纠缠相干态输入非线性
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container_title	Chinese physics B
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creator	魏朝平胡小玉於亚飞张智明
description	We investigate the phase sensitivity of the SU（1,1） interfereometer [SU（1,1）I] and the modified Mach-Zehnder in- terferometer （MMZI） with the entangled coherent states （ECS） as inputs. We consider the ideal case and the situations in which the photon losses are taken into account. We find that, under ideal conditions, the phase sensitivity of both the MMZI and the SU（1,1）I can beat the shot-noise limit （SNL） and approach the Heisenberg limit （HL）. In the presence of photon losses, the ECS can beat the coherent and squeezed states as inputs in the SU（1,1）I, and the MMZI is more robust against internal photon losses than the SU（1,1）I.
doi_str_mv	10.1088/1674-1056/25/4/040601
format	Article
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subjects	Coherence ECS Interferometers Mach-Zehnder interferometers Nonlinearity Photons 干涉仪损失比散粒噪声相位灵敏度纠缠相干态输入非线性
title	Phase sensitivity of two nonlinear interferometers with inputting entangled coherent states
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