Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection

Dong Li; Bryan T. Gard; Yang Gao; Chun-Hua Yuan; Weiping Zhang; Hwang Lee; Jonathan P. Dowling

doi:10.1103/PhysRevA.94.063840

Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection

Quantum Physics 2016-12-28 v2

Authors: Dong Li , Bryan T. Gard , Yang Gao , Chun-Hua Yuan , Weiping Zhang , Hwang Lee , Jonathan P. Dowling

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Abstract

We theoretically investigate the phase sensitivity with parity detection on an SU(1,1) interferometer with a coherent state combined with a squeezed vacuum state. This interferometer is formed with two parametric amplifiers for beam splitting and recombination instead of beam splitters. We show that the sensitivity of estimation phase approaches Heisenberg limit and give the corresponding optimal condition. Moreover, we derive the quantum Cram\'er-Rao bound of the SU(1,1) interferometer.

Keywords

SU(1,1) interferometer phase sensitivity Heisenberg limit parity detection quantum Cramér-Rao bound squeezed vacuum state

Cite

@article{arxiv.1603.09019,
  title  = {Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection},
  author = {Dong Li and Bryan T. Gard and Yang Gao and Chun-Hua Yuan and Weiping Zhang and Hwang Lee and Jonathan P. Dowling},
  journal= {arXiv preprint arXiv:1603.09019},
  year   = {2016}
}

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9 pages, 2 figures, 3 tables

Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection

Abstract

Keywords

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