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Description
  • The decoherence rate is a nonlinear channel parameter that describes quantitatively the decay of the off-diagonal elements of a density operator in the decoherence basis. We address the question of how to experimentally access such a nonlinear parameter directly without the need for complete process tomography. In particular, we design a simple experiment working with two copies of the channel, in which the registered mean value of a two-valued measurement directly determines the value of the average decoherence rate. No prior knowledge of the decoherence basis is required.
  • The decoherence rate is a nonlinear channel parameter that describes quantitatively the decay of the off-diagonal elements of a density operator in the decoherence basis. We address the question of how to experimentally access such a nonlinear parameter directly without the need for complete process tomography. In particular, we design a simple experiment working with two copies of the channel, in which the registered mean value of a two-valued measurement directly determines the value of the average decoherence rate. No prior knowledge of the decoherence basis is required. (en)
Title
  • Direct estimation of decoherence rates
  • Direct estimation of decoherence rates (en)
skos:prefLabel
  • Direct estimation of decoherence rates
  • Direct estimation of decoherence rates (en)
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  • RIV/00216224:14330/12:00057925!RIV13-GA0-14330___
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  • P(GAP202/12/1142), S
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  • 5
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  • 131418
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  • RIV/00216224:14330/12:00057925
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  • estimation; decoherence; unitary k designs (en)
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  • US - Spojené státy americké
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  • [0D58B1DE6BA4]
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  • Physical Review A (Atomic, Molecular, and Optical Physics)
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  • 86
http://linked.open...iv/tvurceVysledku
  • Bužek, Vladimír
  • Rapčan, Peter
  • Ziman, Mário
  • Rau, Jochen
http://linked.open...ain/vavai/riv/wos
  • 000310967800003
issn
  • 1050-2947
number of pages
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  • 10.1103/PhysRevA.86.052109
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  • 14330
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