Stationary entanglement in N-atom subradiant degenerate cascade systems
Journal Article
·
· Physical Review. A
- Turku Center for Quantum Physics, Department of Physics and Astronomy, University of Turku, FIN-20014 Turun Yliopisto (Finland)
We address ultracold N-atom degenerate cascade systems and show that stationary subradiant states, already observed in the semiclassical regime, also exist in a fully quantum regime and for a small number of atoms. We explicitly evaluate the amount of stationary entanglement for the two-atom configuration and show full inseparability for the three-atom case. We also show that a continuous variable description of the systems is not suitable to detect entanglement due to the non-Gaussianity of subradiant states.
- OSTI ID:
- 21537032
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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