Intramode-correlation-enhanced phase sensitivities in an SU(1,1) interferometer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Qian-Kun Gong
  • Xiu-Ling Hu
  • Dong Li
  • Chun-Hua Yuan
  • Weiping Zhang

Detail(s)

Original languageEnglish
Article number033809
Journal / PublicationPhysical Review A
Volume96
Issue number3
Publication statusPublished - 6 Sep 2017
Externally publishedYes

Abstract

We theoretically derive the lower and upper bounds of quantum Fisher information (QFI) of an SU(1,1) interferometer whatever the input state chosen. According to the QFI, the crucial resource for quantum enhancement is shown to be large intramode correlations indicated by the Mandel Q parameter. The subtraction of photons from the squeezed vacuum state has the effect of increasing the average photon number of the new field state, as well as the intramode correlations. For example, for a coherent state âŠ-a squeezed vacuum state with a given fixed input mean number of photons as the input, if p photons are subtracted from the squeezed-vacuum state before inputting the SU(1,1) interferometer, the phase sensitivities can be improved due to the intramode-correlation increment.

Bibliographic Note

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Citation Format(s)

Intramode-correlation-enhanced phase sensitivities in an SU(1,1) interferometer. / Gong, Qian-Kun; Hu, Xiu-Ling; Li, Dong et al.

In: Physical Review A, Vol. 96, No. 3, 033809, 06.09.2017.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review