EFFECT OF FEEDBACK ON THE DECOHERENCE OF A SCHRODINGER-CAT STATE - A QUANTUM TRAJECTORY DESCRIPTION

Authors
GOETSCH P TOMBESI P VITALI D
Citation
P. Goetsch et al., EFFECT OF FEEDBACK ON THE DECOHERENCE OF A SCHRODINGER-CAT STATE - A QUANTUM TRAJECTORY DESCRIPTION, Physical review. A, 54(5), 1996, pp. 4519-4527
Citations number
35
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
54
Issue
5
Year of publication
1996
Pages
4519 - 4527
Database
ISI
SICI code
1050-2947(1996)54:5<4519:EOFOTD>2.0.ZU;2-E
Abstract
The linear stochastic Schrodinger equation of a cavity mode subject to a homodyne measurement and to a phase-sensitive feedback loop realize d with part of the output homodyne photocurrent is derived. We show th at quantum feedback has stabilizing effects which manifest themselves in a significant retardation of the decoherence of a Schrodinger-cat s tate.