J 2006

Entanglement, purity and energy: Two qubits vs Two modes

MCHUGH, Derek, Mário ZIMAN and Vladimír BUŽEK

Basic information

Original name

Entanglement, purity and energy: Two qubits vs Two modes

Name in Czech

Entanglováním čistota a energie: Dva qubity vs. dva módy

Authors

MCHUGH, Derek (372 Ireland), Mário ZIMAN (703 Slovakia, guarantor) and Vladimír BUŽEK (703 Slovakia)

Edition

Physical Review A, New York, American Physical Society, 2006, 1050-2947

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10301 Atomic, molecular and chemical physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 3.047

RIV identification code

RIV/00216224:14330/06:00016172

Organization unit

Faculty of Informatics

UT WoS

000241723100026

Keywords in English

entanglement; purity; energy

Tags

International impact, Reviewed
Změněno: 29/6/2009 22:11, RNDr. Lukáš Boháč

Abstract

V originále

We study the relationship between the entanglement, mixedness, and energy of two-qubit and two-mode Gaussian quantum states. We parametrize the set of allowed states of these two fundamentally different physical systems using measures of entanglement, mixedness, and energy that allow us to compare and contrast the two systems using a phase diagram. This phase diagram enables one to clearly identify not only the physically allowed states, but the set of states connected under an arbitrary quantum operation. We pay particular attention to the maximally entangled mixed states of each system. Following this we investigate how efficiently one may transfer entanglement from two-mode to two-qubit states.

In Czech

Studuje se vztah mezi entanglováním, smíšeností a energií dvou-qubitových a dvou-módových Gaussových kvantových stavů.

Links

GA201/04/1153, research and development project
Name: Kvantové zdroje a primitiva
Investor: Czech Science Foundation, Quantum Resources and primitives
MSM0021622419, plan (intention)
Name: Vysoce paralelní a distribuované výpočetní systémy
Investor: Ministry of Education, Youth and Sports of the CR, Highly Parallel and Distributed Computing Systems