Entanglement sensitivity to signal attenuation and amplification

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F14%3A00073889" target="_blank" >RIV/00216224:14330/14:00073889 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevA.90.010301" target="_blank" >http://dx.doi.org/10.1103/PhysRevA.90.010301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevA.90.010301" target="_blank" >10.1103/PhysRevA.90.010301</a>

Result language

angličtina

Original language name

Entanglement sensitivity to signal attenuation and amplification

Original language description

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&gt;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 performancefor 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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BE - Theoretical physics

OECD FORD branch

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Project

<a href="/en/project/GAP202%2F12%2F1142" target="_blank" >GAP202/12/1142: Weak Sources of Entanglement and Randomness</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review A

ISSN

1050-2947

e-ISSN

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Volume of the periodical

90

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

1-5

UT code for WoS article

000338649000001

EID of the result in the Scopus database

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