SMALL AMOUNT OF SQUEEZING IN HIGH-SENSITIVE REALISTIC INTERFEROMETRY

Authors
PARIS MGA
Citation
Mga. Paris, SMALL AMOUNT OF SQUEEZING IN HIGH-SENSITIVE REALISTIC INTERFEROMETRY, Physics letters. A, 201(2-3), 1995, pp. 132-138
Citations number
8
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
201
Issue
2-3
Year of publication
1995
Pages
132 - 138
Database
ISI
SICI code
0375-9601(1995)201:2-3<132:SAOSIH>2.0.ZU;2-8
Abstract
The input states of an interferometer have been optimized at fixed tot al photon number N and quantum efficiency eta. I show that the phase s ensitivity is bounded by Delta phi similar to N--3/4 for a coherent in put signal and by Delta phi similar to N-1 for squeezed optimized inpu ts. I also show that in actual non-efficient interferometers only litt le squeezing is needed to reach the best sensitivity.