Entangled graphs: Classical correlations in multi-qubit entangled systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F03%3A00009612" target="_blank" >RIV/00216224:14330/03:00009612 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14330/03:00008726

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Entangled graphs: Classical correlations in multi-qubit entangled systems

Popis výsledku v původním jazyce

Bipartite correlations in multiqubit systems cannot be shared freely. The presence of entanglement or classical correlation on certain pairs of qubits may imply correlations on other pairs. We present a method of characterization of bipartite correlations in multiqubit systems using a concept of entangled graphs which has been introduced in our earlier work @M. Plesch and V. Bužek, Phys. Rev. A 67, 012322 ~2003!#. In entangled graphs, each qubit is represented by a vertex while the entanglement and classical correlations are represented by two types of edges. We prove by construction that any entangled graph with classical correlations can be represented by a mixed state of N qubits. However, not all entangled graphs with classical correlations can berepresented by a pure state.

Název v anglickém jazyce

Entangled graphs: Classical correlations in multi-qubit entangled systems

Popis výsledku anglicky

Bipartite correlations in multiqubit systems cannot be shared freely. The presence of entanglement or classical correlation on certain pairs of qubits may imply correlations on other pairs. We present a method of characterization of bipartite correlations in multiqubit systems using a concept of entangled graphs which has been introduced in our earlier work @M. Plesch and V. Bužek, Phys. Rev. A 67, 012322 ~2003!#. In entangled graphs, each qubit is represented by a vertex while the entanglement and classical correlations are represented by two types of edges. We prove by construction that any entangled graph with classical correlations can be represented by a mixed state of N qubits. However, not all entangled graphs with classical correlations can berepresented by a pure state.

Druh

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

CEP obor

IN - Informatika

OECD FORD obor

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Projekt

<a href="/cs/project/GA201%2F01%2F0413" target="_blank" >GA201/01/0413: Kvantové zpracování informací</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název periodika

Physical Review A (Atomic, Molecular, and Optical Physics)

ISSN

1094-1622

e-ISSN

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Svazek periodika

68

Číslo periodika v rámci svazku

01

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

2313-2318

Kód UT WoS článku

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EID výsledku v databázi Scopus

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