About: Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit     Goto   Sponge   NotDistinct   Permalink

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  • We show that for any Hilbert-space dimension, the optimal 1-->2 universal quantum cloner can be constructed from essentially the same quantum circuit, i.e., we find a universal design for universal cloners. In the case of infinite dimensions (which includes continuous variable quantum systems) the universal cloner reduces to an essentially classical device. More generally, we construct a universal quantum circuit for distributing qudits in any dimension which acts covariantly under generalized displacements and momentum kicks. The behavior of this covariant distributor is controlled by its initial state. We show that suitable choices for this initial state yield both universal cloners and optimized cloners for limited alphabets of states related by generalized phase-space displacements.
  • We show that for any Hilbert-space dimension, the optimal 1-->2 universal quantum cloner can be constructed from essentially the same quantum circuit, i.e., we find a universal design for universal cloners. In the case of infinite dimensions (which includes continuous variable quantum systems) the universal cloner reduces to an essentially classical device. More generally, we construct a universal quantum circuit for distributing qudits in any dimension which acts covariantly under generalized displacements and momentum kicks. The behavior of this covariant distributor is controlled by its initial state. We show that suitable choices for this initial state yield both universal cloners and optimized cloners for limited alphabets of states related by generalized phase-space displacements. (en)
Title
  • Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit
  • Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit (en)
skos:prefLabel
  • Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit
  • Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit (en)
skos:notation
  • RIV/00216224:14330/01:00005666!RIV/2002/GA0/143302/N
http://linked.open.../vavai/riv/strany
  • 2313
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA201/98/0369)
http://linked.open...iv/cisloPeriodika
  • 5
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  • 693798
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  • RIV/00216224:14330/01:00005666
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  • quantum theory (en)
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  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [F5229BE13C62]
http://linked.open...i/riv/nazevZdroje
  • Physical Review A
http://linked.open...in/vavai/riv/obor
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http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 63
http://linked.open...iv/tvurceVysledku
  • Bůžek, Vladimír
  • Hillery, M.
  • Braunstein, S. L.
issn
  • 1050-2947
number of pages
http://localhost/t...ganizacniJednotka
  • 14330
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