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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BE - Teoretická fyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GA201%2F98%2F0369" target="_blank" >GA201/98/0369: Informatika jako třetí metodologie</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název periodika

Physical Review A

ISSN

1050-2947

e-ISSN

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Svazek periodika

65

Číslo periodika v rámci svazku

04

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

"042105-1"-"042105-11"

Kód UT WoS článku

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EID výsledku v databázi Scopus

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