Measuring nonclassical correlations of two-photon states
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F13%3A33145379" target="_blank" >RIV/61989592:15310/13:33145379 - isvavai.cz</a>
Result on the web
<a href="http://pra.aps.org/pdf/PRA/v87/i6/e062102" target="_blank" >http://pra.aps.org/pdf/PRA/v87/i6/e062102</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.87.062102" target="_blank" >10.1103/PhysRevA.87.062102</a>
Alternative languages
Result language
angličtina
Original language name
Measuring nonclassical correlations of two-photon states
Original language description
The threshold between classical and nonclassical two-qubit states is drawn at the place when these states can no longer be described by classical correlations, i.e., quantum discord or entanglement appear. However, to check if the correlations are classical (in terms of quantum discord and entanglement) it is sufficient to witness the lack of quantum discord because its zero value implies the lack of entanglement. We explain how the indicator of quantum discord introduced by Girolami and Adesso [Phys. Rev. Lett. 108, 150403 (2012)] can be practically measured in linear-optical systems using standard beam splitters and photon detectors. We study the efficiency of the setup assuming both ideal and real components and show that the efficiency of the proposed implementation is better than the full two-photon quantum tomography. Thus, we demonstrate that a class of experiments previously available on NMR platform can be implemented in optical systems.
Czech name
—
Czech description
—
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
—
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2013
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
—
Volume of the periodical
87
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
"062102-1"-"060102-7"
UT code for WoS article
000319910500002
EID of the result in the Scopus database
—