Optimal unambiguous comparison of two unknown squeezed vacua
Journal Article
·
· Physical Review. A
- CNISM UdR Milano Universita, I-20133 Milano (Italy)
- Research Centre for Quantum Information, Institute of Physics, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 11 Bratislava (Slovakia)
We propose a scheme for the unambiguous state comparison (USC) of two unknown squeezed vacuum states of the electromagnetic field. Our setup is based on linear optical elements and photon-number detectors, and it achieves optimal USC in an ideal case of unit quantum efficiency. In realistic conditions, i.e., for nonunit quantum efficiency of photodetectors, we evaluate the probability of getting an ambiguous result as well as the reliability of the scheme, thus showing its robustness in comparison to previous proposals.
- OSTI ID:
- 21529046
- 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
Similar Records
Unambiguous identification of coherent states: Searching a quantum database
Quantum-state engineering assisted by entanglement
Balancing efficiencies by squeezing in realistic eight-port homodyne detection
Journal Article
·
Wed Aug 15 00:00:00 EDT 2007
· Physical Review. A
·
OSTI ID:21011401
Quantum-state engineering assisted by entanglement
Journal Article
·
Mon Mar 31 23:00:00 EST 2003
· Physical Review. A
·
OSTI ID:20633934
Balancing efficiencies by squeezing in realistic eight-port homodyne detection
Journal Article
·
Fri Apr 15 00:00:00 EDT 2011
· Physical Review. A
·
OSTI ID:21544704