Inseparability criterion for continuous variable systems

Authors
Duan, LM Giedke, G Cirac, JI Zoller, P
Citation
Lm. Duan et al., Inseparability criterion for continuous variable systems, PHYS REV L, 84(12), 2000, pp. 2722-2725
Citations number
17
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
84
Issue
12
Year of publication
2000
Pages
2722 - 2725
Database
ISI
SICI code
0031-9007(20000320)84:12<2722:ICFCVS>2.0.ZU;2-U
Abstract
An inseparability criterion based on the total variance of a pair of Einste in-Podolsky-Rosen type operators is proposed for continuous variable system s. The criterion provides a sufficient condition for entanglement of any tw o-party continuous variable states. Furthermore, for all Gaussian states, t his criterion turns out to be a necessary and sufficient condition for inse parability.