Quantum non-demolition measurement of photon number with atom-light interferometers

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

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Author(s)

  • S. Y. Chen
  • L. Q. Chen
  • Z. Y. Ou
  • Weiping Zhang

Detail(s)

Original languageEnglish
Pages (from-to)31827-31839
Journal / PublicationOptics Express
Volume25
Issue number25
Publication statusPublished - 11 Dec 2017
Externally publishedYes

Abstract

When atoms are illuminated by an o -resonant field, the AC Stark e ect will lead to phase shifts in atomic states. The phase shifts are proportional to the photon number of the o -resonant illuminating field. By measuring the atomic phase with newly developed atom-light hybrid interferometers, we can achieve quantum non-demolition measurement of the photon number of the optical field. In this paper, we analyze theoretically the performance of this QND measurement scheme by using the QND measurement criteria established by Holland et al [Phys. Rev. A 42, 2995 (1990)]. We find the quality of the QND measurement depends on the phase resolution of the atom-light hybrid interferometers. We apply this QND measurement scheme to a twin-photon state from parametric amplifier to verify the photon correlation in the twin beams. Furthermore, a sequential QND measurement procedure is analyzed for verifying the projection property of quantum measurement and for the quantum information tapping. Finally, we discuss the possibility for single-photon-number-resolving detection via QND measurement.

Bibliographic Note

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Citation Format(s)

Quantum non-demolition measurement of photon number with atom-light interferometers. / Chen, S. Y.; Chen, L. Q.; Ou, Z. Y. et al.

In: Optics Express, Vol. 25, No. 25, 11.12.2017, p. 31827-31839.

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