Bell nonlocality and fully entangled fraction measured in an entanglement-swapping device without quantum state tomography
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73580743" target="_blank" >RIV/61989592:15310/17:73580743 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/17:00478698
Result on the web
<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.95.030102" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.95.030102</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.95.030102" target="_blank" >10.1103/PhysRevA.95.030102</a>
Alternative languages
Result language
angličtina
Original language name
Bell nonlocality and fully entangled fraction measured in an entanglement-swapping device without quantum state tomography
Original language description
We propose and experimentally implement an efficient procedure based on entanglement swapping to determine the Bell nonlocality measure ofHorodecki et al. [Phys. Lett. A200, 340 (1995)] and the fully entangled fraction of Bennett et al. [Phys. Rev. A54, 3824 (1996)] of an arbitrary two-qubit polarization-encoded state. The nonlocality measure corresponds to the amount of the violation of the Clauser-Horne-Shimony-Holt (CHSH) optimized over all measurement settings. By using simultaneously two copies of a given state, we measure directly only six parameters. This is an experimental determination of these quantities without quantum state tomography or continuous monitoring of all measurement bases in the usual CHSH inequality tests. We analyze how well the measured degrees of Bell nonlocality and other entanglement witnesses (including the fully entangled fraction and a nonlinear entropic witness) of an arbitrary two-qubit state can estimate its entanglement. In particular, we measure these witnesses and estimate the negativity of various two-qubit Werner states. Our approach could especially be useful for quantum communication protocols based on entanglement swapping.
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
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
2017
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
2469-9926
e-ISSN
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Volume of the periodical
95
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
"030102-1"-"030102-7"
UT code for WoS article
000395984700001
EID of the result in the Scopus database
2-s2.0-85015612523