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  • We propose a scheme for unambiguous state comparison (USC) of two unknown squeezed vacuum states of an electromagnetic field. Our setup is based on linear optical elements and photon-number detectors, and achieves optimal USC in an ideal case of unit quantum efficiency. In realistic conditions, i.e., for non-unit 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.
  • We propose a scheme for unambiguous state comparison (USC) of two unknown squeezed vacuum states of an electromagnetic field. Our setup is based on linear optical elements and photon-number detectors, and achieves optimal USC in an ideal case of unit quantum efficiency. In realistic conditions, i.e., for non-unit 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. (en)
Title
  • Optimal unambiguous comparison of two unknown squeezed vacua
  • Optimal unambiguous comparison of two unknown squeezed vacua (en)
skos:prefLabel
  • Optimal unambiguous comparison of two unknown squeezed vacua
  • Optimal unambiguous comparison of two unknown squeezed vacua (en)
skos:notation
  • RIV/00216224:14330/11:00052125!RIV12-MSM-14330___
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  • Z(MSM0021622419)
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  • 1
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  • 218604
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  • RIV/00216224:14330/11:00052125
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  • Quantum information processing; squeezed vacuum states; comparison (en)
http://linked.open.../riv/klicoveSlovo
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  • US - Spojené státy americké
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  • [AD882EB4B84D]
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  • Physical Review A
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  • 83
http://linked.open...iv/tvurceVysledku
  • Bužek, Vladimír
  • Olivares, Stefano
  • Paris, Matteo G. A.
  • Rapčan, Peter
  • Sedlák, Michal
http://linked.open...ain/vavai/riv/wos
  • 000286740600002
http://linked.open...n/vavai/riv/zamer
issn
  • 1050-2947
number of pages
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  • 10.1103/PhysRevA.83.012313
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  • 14330
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