Process reconstruction: From unphysical to physical maps via maximum likelihood

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F05%3A00013058" target="_blank" >RIV/00216224:14330/05:00013058 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Process reconstruction: From unphysical to physical maps via maximum likelihood

Original language description

We show that the method of maximum likelihood (MML) provides us with an efficient scheme for the reconstruction of quantum channels from incomplete measurement data. By construction this scheme always results in estimations of channels that are completely positive. Using this property we use the MML for a derivation of physical approximations of unphysical operations. In particular, we analyze the optimal approximation of the universal NOT gate as well as the physical approximation of a quantum nonlinear polarization rotation.

Czech name

Rekonstrukce procesu: Od nefyzikálních k fyzikálním zobrazením přes maximální podobnost

Czech description

Analýza metody "maximal likelihood" při rekonstrukci procesu.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BE - Theoretical physics

OECD FORD branch

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Project

<a href="/en/project/GA201%2F04%2F1153" target="_blank" >GA201/04/1153: Quantum resources and primitives</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2005

Confidentiality

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

Name of the periodical

Physical Review A

ISSN

1050-2947

e-ISSN

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Volume of the periodical

Vol. 72

Issue of the periodical within the volume

No. 2

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

"A022106"

UT code for WoS article

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EID of the result in the Scopus database

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