Diluting quantum information: An analysis of information transfer in system-reservoir interactions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F02%3A00007539" target="_blank" >RIV/00216224:14330/02:00007539 - 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

Diluting quantum information: An analysis of information transfer in system-reservoir interactions

Original language description

We design a universal quantum homogenizer, which is a quantum machine that takes as an input a system qubit initially in the state $rho$ and a set of N reservoir qubits initially prepared in the same state $xi$. In the homogenizer the system qubit sequentially interacts with the reservoir qubits via the partial swap transformation. The homogenizer realizes, in the limit sense, the transformation such that at the output each qubit is in an arbitratily small neighbourhood of the state $xi$ irrespectiveof the initial states of the system and the reservoir qubits. This means that the system qubit undergoes an evolution that has a fixed point, which is the reservoir state $xi$. We also study approximate homogenization when the reservoir is composed ofa finite set of identically prepared qubits. The homogenizer allows us to understand various aspects of the dynamics of open systems interacting with environments in non-equilibrium states. In particular, the reversibility vs or irreversi

Czech name

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Czech description

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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%2F98%2F0369" target="_blank" >GA201/98/0369: Informatics as the third methodology</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2002

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

65

Issue of the periodical within the volume

04

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

"042105-1"-"042105-11"

UT code for WoS article

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EID of the result in the Scopus database

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