Quantum nature of Gaussian discord: Experimental evidence and role of system-environment correlations
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33154635" target="_blank" >RIV/61989592:15310/15:33154635 - isvavai.cz</a>
Result on the web
<a href="http://journals.aps.org/pra/abstract/10.1103/PhysRevA.91.050301#fulltext" target="_blank" >http://journals.aps.org/pra/abstract/10.1103/PhysRevA.91.050301#fulltext</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.91.050301" target="_blank" >10.1103/PhysRevA.91.050301</a>
Alternative languages
Result language
angličtina
Original language name
Quantum nature of Gaussian discord: Experimental evidence and role of system-environment correlations
Original language description
We provide experimental evidence of quantum features in bipartite states classified as entirely classical according to a conventional criterion based on the Glauber P function but possessing nonzero Gaussian quantum discord. Their quantum nature is experimentally revealed by acting locally on one part of the discordant state. We experimentally verify and investigate the effect of discord increase under the action of local loss and link it to the entanglement with the environment. Adding an environmentalsystem purifying the state, we unveil the flow of quantum correlations within a global pure system using the Koashi-Winter inequality. For a discordant state generated by splitting a state in which the initial squeezing is destroyed by random displacements, we demonstrate the recovery of entanglement highlighting the role of system-environment correlations.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BH - Optics, masers and lasers
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP205%2F12%2F0694" target="_blank" >GAP205/12/0694: Complex quantum correlations and their applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review A
ISSN
1050-2947
e-ISSN
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Volume of the periodical
91
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
"050301-1"-"050301-6"
UT code for WoS article
000354547800001
EID of the result in the Scopus database
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