Quantum metrology with parametric amplifier-based photon correlation interferometers

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

243 Scopus Citations
View graph of relations

Author(s)

  • F. Hudelist
  • Jia Kong
  • Cunjin Liu
  • Jietai Jing
  • Weiping Zhang

Detail(s)

Original languageEnglish
Article number3049
Journal / PublicationNature Communications
Volume5
Publication statusPublished - 29 Jan 2014
Externally publishedYes

Abstract

Conventional interferometers usually utilize beam splitters for wave splitting and recombination. These interferometers are widely used for precision measurement. Their sensitivity for phase measurement is limited by the shot noise, which can be suppressed with squeezed states of light. Here we study a new type of interferometer in which the beam splitting and recombination elements are parametric amplifiers. We observe an improvement of 4.1±0.3dB in signal-to-noise ratio compared with a conventional interferometer under the same operating condition, which is a 1.6-fold enhancement in rms phase measurement sensitivity beyond the shot noise limit. The improvement is due to signal enhancement. Combined with the squeezed state technique for shot noise suppression, this interferometer promises further improvement in sensitivity. Furthermore, because nonlinear processes are involved in this interferometer, we can couple a variety of different waves and form new types of hybrid interferometers, opening a door for many applications in metrology.

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Quantum metrology with parametric amplifier-based photon correlation interferometers. / Hudelist, F.; Kong, Jia; Liu, Cunjin; Jing, Jietai; Ou, Z. Y.; Zhang, Weiping.

In: Nature Communications, Vol. 5, 3049, 29.01.2014.

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