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Description
  • Bylo navrženo a experimentálně demonstrováno optimální Gaussovské schéma pro částečnou estimaci neznámého koherentního stavu. Informační zisk a narušení stavu byly kvantifikovány množstvím přidaného šumu. Byla nalezena optimální závislost mezi šumem ve výstupním kvantovém stavu a v klasickém odhadu stavu. Experimentální realizace tohoto měření byla uskutečněna pomocí lineární optiky, homodynní detekce a dopředné vazby. (cs)
  • We propose and experimentally demonstrate an optimal nonunity gain Gaussian scheme for partial measurement of an unknown coherent state that causes minimal disturbance of the state. The information gain and the state disturbance are quantified by the noise added to the measurement outcomes and to the output state, respectively. We derive the optimal trade-off relation between the two noises and we show that the tradeoff is saturated by nonunity gain teleportation. Optimal partial measurement is demonstrated experimentally using a linear optics scheme with feedforward.
  • We propose and experimentally demonstrate an optimal nonunity gain Gaussian scheme for partial measurement of an unknown coherent state that causes minimal disturbance of the state. The information gain and the state disturbance are quantified by the noise added to the measurement outcomes and to the output state, respectively. We derive the optimal trade-off relation between the two noises and we show that the tradeoff is saturated by nonunity gain teleportation. Optimal partial measurement is demonstrated experimentally using a linear optics scheme with feedforward. (en)
Title
  • Nonunity gain minimal-disturbance measurement
  • Nonunity gain minimal-disturbance measurement (en)
  • Kvantová měření s nejednotkovým ziskem, jež minimálně narušují měřený stav (cs)
skos:prefLabel
  • Nonunity gain minimal-disturbance measurement
  • Nonunity gain minimal-disturbance measurement (en)
  • Kvantová měření s nejednotkovým ziskem, jež minimálně narušují měřený stav (cs)
skos:notation
  • RIV/61989592:15310/07:00004535!RIV08-MSM-15310___
http://linked.open.../vavai/riv/strany
  • 032309(11)
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GC202/07/J040), P(LC06007), Z(MSM6198959213)
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
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 437575
http://linked.open...ai/riv/idVysledku
  • RIV/61989592:15310/07:00004535
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • quantum measurement; coherent states; quantum state estimation (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [0BFE5C222F1B]
http://linked.open...i/riv/nazevZdroje
  • Physical Review A
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 76
http://linked.open...iv/tvurceVysledku
  • Filip, Radim
  • Fiurášek, Jaromír
  • Mišta, Ladislav
  • Andersen, Ulrik
  • Leuchs, Gerd
  • Sabuncu, Metin
http://linked.open...n/vavai/riv/zamer
issn
  • 1050-2947
number of pages
http://localhost/t...ganizacniJednotka
  • 15310
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