Priority Choice Experimental Two-Qubit Tomography: Measuring One by One All Elements of Density Matrices
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33158912" target="_blank" >RIV/61989592:15310/16:33158912 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/16:00463819
Result on the web
<a href="http://file:///D:/dokumenty/Downloads/srep19610.pdf" target="_blank" >http://file:///D:/dokumenty/Downloads/srep19610.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/srep19610" target="_blank" >10.1038/srep19610</a>
Alternative languages
Result language
angličtina
Original language name
Priority Choice Experimental Two-Qubit Tomography: Measuring One by One All Elements of Density Matrices
Original language description
In standard optical tomographic methods, the off-diagonal elements of a density matrix. are measured indirectly. Thus, the reconstruction of., even if it is based on linear inversion, typically magnifies small errors in the experimental data. Recently, an optimal tomography solution measuring all the elements of. one-by-one without error magnification has been theoretically proposed. We implemented this method for two-qubit polarization states. For comparison, we also experimentally implemented other well-known tomographic protocols, either based solely on local measurements (of, e.g., the Pauli operators and James-Kwiat-Munro-White projectors) or with mutually unbiased bases requiring both local and global measurements. We reconstructed seventeen separable, partially and maximally entangled two-qubit polarization states. Our experiments show that our method has the highest stability against errors in comparison to other quantum tomographies. In particular, we demonstrate that each optimally-reconstructed state is embedded in an uncertainty circle of the smallest radius, both in terms of trace distance and disturbance. We explain how to experimentally estimate uncertainty radii for all the implemented tomographies and show that, for each reconstructed state, the relevant uncertainty circles intersect indicating the approximate location of the corresponding physical density matrix.
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
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
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Scientific Reports
ISSN
2045-2322
e-ISSN
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Volume of the periodical
6
Issue of the periodical within the volume
19610
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
"19610-1"-"19610-7"
UT code for WoS article
000368768200001
EID of the result in the Scopus database
2-s2.0-84955558646