2021
DOI: 10.48550/arxiv.2111.01375
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Supersensitivity of Kerr phase estimation with two-mode squeezed vacuum states

Yun-Feng Guo,
Wei Zhong,
Lan Zhou
et al.

Abstract: We analytically investigate the sensitivity of Kerr nonlinear phase estimation in a Mach-Zehnder interferometer with two-mode squeezed vacuum states. We find that such a metrological scheme could access a sensitivity scaling over the Boixo et al.'s generalized sensitivity limit [S. Boixo et al., Phys. Rev. Lett. 98, 090401 (2007)], which is saturable with celebrated NOON states. We also show that parity detection is a quasi-optimal measurement which can nearly saturate the quantum Cramér-Rao bound in the afor… Show more

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