About: Optimal probabilistic cloning and purification of quantum states     Goto   Sponge   NotDistinct   Permalink

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Description
  • Vyšetřujeme optimální pravděpodobnostní kopírování a purifikace kvantových stavů. (cs)
  • We investigate the probabilistic cloning and purification of quantum states. The performance of these probabilistic operations is quantified by the average fidelity between the ideal and actual output states. We provide a simple formula for the maximal achievable average fidelity and we explicitly show how to construct a probabilistic operation that achieves this fidelity. We illustrate our method on several examples such as the phase covariant cloning of qubits, cloning of coherent states, and purification of qubits transmitted via depolarizing channel and amplitude damping channel. Our examples reveal that the probabilistic cloner may yield higher fidelity than the best deterministic cloner even when the states that should be cloned are linearly dependent and are drawn from a continuous set.
  • We investigate the probabilistic cloning and purification of quantum states. The performance of these probabilistic operations is quantified by the average fidelity between the ideal and actual output states. We provide a simple formula for the maximal achievable average fidelity and we explicitly show how to construct a probabilistic operation that achieves this fidelity. We illustrate our method on several examples such as the phase covariant cloning of qubits, cloning of coherent states, and purification of qubits transmitted via depolarizing channel and amplitude damping channel. Our examples reveal that the probabilistic cloner may yield higher fidelity than the best deterministic cloner even when the states that should be cloned are linearly dependent and are drawn from a continuous set. (en)
Title
  • Optimální pravděpodobnostní kopírování a purifikace kvantových stavů (cs)
  • Optimal probabilistic cloning and purification of quantum states
  • Optimal probabilistic cloning and purification of quantum states (en)
skos:prefLabel
  • Optimální pravděpodobnostní kopírování a purifikace kvantových stavů (cs)
  • Optimal probabilistic cloning and purification of quantum states
  • Optimal probabilistic cloning and purification of quantum states (en)
skos:notation
  • RIV/61989592:15310/04:00002365!RIV/2005/MSM/153105/N
http://linked.open.../vavai/riv/strany
  • 032308-1-9
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(LN00A015)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
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  • 578163
http://linked.open...ai/riv/idVysledku
  • RIV/61989592:15310/04:00002365
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • optimal probabilistic cloning;quantum states (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [DB713EA8EFFA]
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
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http://linked.open...v/svazekPeriodika
  • 70
http://linked.open...iv/tvurceVysledku
  • Fiurášek, Jaromír
issn
  • 1050-2947
number of pages
http://localhost/t...ganizacniJednotka
  • 15310
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