Conditional quantum-state engineering in repeated 2-photon down-conversion

Authors
Clausen, J Hansen, N Knoll, L Mlynek, J Welsch, DG
Citation
J. Clausen et al., Conditional quantum-state engineering in repeated 2-photon down-conversion, APP PHYS B, 72(1), 2001, pp. 43-50
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS B-LASERS AND OPTICS
ISSN journal
09462171 → ACNP
Volume
72
Issue
1
Year of publication
2001
Pages
43 - 50
Database
ISI
SICI code
0946-2171(200101)72:1<43:CQEIR2>2.0.ZU;2-D
Abstract
The U(1,1) and U(2) transformations realized by three-mode interaction in t he respective parametric approximations are studied in conditional measurem ent, and the corresponding non-unitary transformation operators are derived . As an application, the preparation of single-mode quantum states using an optical feedback loop is discussed, with special emphasis on Fock-state pr eparation. For that example, the influence of non-perfect detection and fee dback is also considered.