FEASIBLE PHASE DETECTION WITH IDEAL SENSITIVITY

Authors
DARIANO GM MACCHIAVELLO C PARIS MGA
Citation
Gm. Dariano et al., FEASIBLE PHASE DETECTION WITH IDEAL SENSITIVITY, Journal of physics. A, mathematical and general, 29(17), 1996, pp. 5605-5610
Citations number
19
Categorie Soggetti
Physics
Journal title
Journal of physics. A, mathematical and general → ACNP
ISSN journal
03054470
Volume
29
Issue
17
Year of publication
1996
Pages
5605 - 5610
Database
ISI
SICI code
0305-4470(1996)29:17<5605:FPDWIS>2.0.ZU;2-R
Abstract
We present a first feasible scheme for detecting the phase of a single mode of radiation with ideal RMS sensitivity delta phi similar to (n) over bar(-1) versus the average number of photons (n) over bar. It in volves pairs of alternate independent homodyne measurements of two con jugated quadratures on a weakly squeezed state at the input. Nonunit q uantum efficiency eta of photodetectors degrades phase sensitivity lea ding to a power law delta phi similar to (n) over bar-(gamma(eta)), wi th gamma increasingversus eta.