Quantum nature of Gaussian discord: Experimental evidence and role of system-environment correlations

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantum nature of Gaussian discord: Experimental evidence and role of system-environment correlations

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Quantum nature of Gaussian discord: Experimental evidence and role of system-environment correlations

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

<a href="/cs/project/GAP205%2F12%2F0694" target="_blank" >GAP205/12/0694: Komplexní kvantové korelace a jejich aplikace</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physical Review A

ISSN

1050-2947

e-ISSN

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Svazek periodika

91

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

"050301-1"-"050301-6"

Kód UT WoS článku

000354547800001

EID výsledku v databázi Scopus

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