Completely Positive Covariant two-Qubit Quantum Processes and Optimal Quantum NOT Operations for Entangled Qubit Pairs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F06%3A04121607" target="_blank" >RIV/68407700:21340/06:04121607 - 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

Completely Positive Covariant two-Qubit Quantum Processes and Optimal Quantum NOT Operations for Entangled Qubit Pairs

Original language description

The structure is investigated of all completely positive quantum operations that transform pure two-qubit input states of a given degree of entanglement in a covariant way. Special cases thereof are quantum NOT operations which transform entangled pure two-qubit input states of a given degree of entanglement into orthogonal states in an optimal way. Based on our general analysis all covariant optimal two-qubit quantum NOT operations are determined. In particular, it is demonstrated that only in the caseof maximally entangled input states can these quantum NOT operations be performed perfectly.

Czech name

Zcela positvní kovariantní 2-qubitové kvantové procesy and optimální kvantové NOT operace for entanglované páry qubitů

Czech description

Studujeme strukturu vsech uplne pozitivnich kvantovych operaci ktere prevadeji vstupni stav s danym provazanim na vystupni stav kovariantnim zpusobem. Specialnim pripadem takoveho zabrazeni je kvantova NOT operace, ktera transformuje optimalne provazanydvou qubitovy stav na jeho ortogonalni komplement. Na zaklade obecne analyzy procesu je podana uplna klasifikace NOT operaci a je ukazano, ze naprosto verna muze byt NOT operace jenom pro maximalne provazane stavy.

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

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)

Publication year

2006

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

73

Issue of the periodical within the volume

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Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

062311-062311

UT code for WoS article

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EID of the result in the Scopus database

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