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  • We analyze general laws of continuous-variable entanglement dynamics during the deterministic attenuation and amplification of the physical signal carrying the entanglement. These processes are inevitably accompanied by noises, so we find fundamental limitations on noise intensities that destroy entanglement of Gaussian and non-Gaussian input states. The phase-insensitive amplification Phi1(x)Phi2(x)...(x)PhiN with the power gain ki>2 (approx 3 dB, i=1,...,N) is shown to destroy entanglement of any N-mode Gaussian state even in the case of quantum-limited performance. In contrast, we demonstrate non-Gaussian states with the energy of a few photons such that their entanglement survives within a wide range of noises beyond quantum-limited performance for any degree of attenuation or gain. We detect entanglement preservation properties of the channel Phi1(x)Phi2, where each mode is deterministically attenuated or amplified.
  • We analyze general laws of continuous-variable entanglement dynamics during the deterministic attenuation and amplification of the physical signal carrying the entanglement. These processes are inevitably accompanied by noises, so we find fundamental limitations on noise intensities that destroy entanglement of Gaussian and non-Gaussian input states. The phase-insensitive amplification Phi1(x)Phi2(x)...(x)PhiN with the power gain ki>2 (approx 3 dB, i=1,...,N) is shown to destroy entanglement of any N-mode Gaussian state even in the case of quantum-limited performance. In contrast, we demonstrate non-Gaussian states with the energy of a few photons such that their entanglement survives within a wide range of noises beyond quantum-limited performance for any degree of attenuation or gain. We detect entanglement preservation properties of the channel Phi1(x)Phi2, where each mode is deterministically attenuated or amplified. (en)
Title
  • Entanglement sensitivity to signal attenuation and amplification
  • Entanglement sensitivity to signal attenuation and amplification (en)
skos:prefLabel
  • Entanglement sensitivity to signal attenuation and amplification
  • Entanglement sensitivity to signal attenuation and amplification (en)
skos:notation
  • RIV/00216224:14330/14:00073889!RIV15-GA0-14330___
http://linked.open...avai/riv/aktivita
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  • P(GAP202/12/1142)
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  • 1
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  • 14709
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  • RIV/00216224:14330/14:00073889
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  • quantum information; entanglement; quantum dynamics; quantum optics (en)
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  • US - Spojené státy americké
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  • [0EA0EACE43A8]
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  • Physical Review A
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  • 90
http://linked.open...iv/tvurceVysledku
  • Ziman, Mário
  • Filippov, Sergey N.
http://linked.open...ain/vavai/riv/wos
  • 000338649000001
issn
  • 1050-2947
number of pages
http://bibframe.org/vocab/doi
  • 10.1103/PhysRevA.90.010301
http://localhost/t...ganizacniJednotka
  • 14330
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