Verifying genuine multipartite entanglement of the whole from its separable parts
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73594754" target="_blank" >RIV/61989592:15310/19:73594754 - isvavai.cz</a>
Result on the web
<a href="https://www.osapublishing.org/optica/fulltext.cfm?uri=optica-6-7-896&id=415360" target="_blank" >https://www.osapublishing.org/optica/fulltext.cfm?uri=optica-6-7-896&id=415360</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OPTICA.6.000896" target="_blank" >10.1364/OPTICA.6.000896</a>
Alternative languages
Result language
angličtina
Original language name
Verifying genuine multipartite entanglement of the whole from its separable parts
Original language description
Ascertaining the large-scale properties of the whole from the properties of its parts is a highly relevant problem in many branches of physics. Here, we investigate a special variant of this task when the parts carry no signs of the global properties in the context of quantum correlation properties in a multipartite optical system. Specifically, we prove experimentally the predicted existence of a three-qubit quantum state with genuine multipartite entanglement (GME) that can be certified solely from its separable two-qubit reduced density matrices. The qubits are encoded into different degrees of freedom of a pair of correlated photons, and the state is prepared by letting the photons propagate through a linear optical circuit. The presence of GME is verified by finding numerically a fully decomposable entanglement witness acting nontrivially only on the reductions of the global state. Our result confirms the viability of detection of emerging global properties of composite quantum systems from the parts that lack the properties.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
<a href="/en/project/GA16-17314S" target="_blank" >GA16-17314S: Complex multiqubit optical quantum logic gates</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Optica
ISSN
2334-2536
e-ISSN
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Volume of the periodical
6
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
896-901
UT code for WoS article
000476637300011
EID of the result in the Scopus database
2-s2.0-85071191232