Maximizing the entanglement of two mixed qubits

W. J. Munro; D. F. V. James; A. G. White; P. G. Kwiat

doi:10.1103/PhysRevA.64.030302

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Maximizing the entanglement of two mixed qubits

W. J. Munro, D. F. V. James, A. G. White, and P. G. Kwiat

Phys. Rev. A 64, 030302(R) – Published 13 August 2001

Abstract

Two-qubit states occupy a large and relatively unexplored Hilbert space. Such states can be succinctly characterized by their degree of entanglement and purity. In this article we investigate entangled mixed states and present a class of states that have the maximum amount of entanglement for a given linear entropy.

Received 23 February 2001

DOI:https://doi.org/10.1103/PhysRevA.64.030302

Authors & Affiliations

W. J. Munro^1,2,*, D. F. V. James³, A. G. White¹, and P. G. Kwiat⁴

¹Special Research Centre for Quantum Computer Technology, University of Queensland, Brisbane, Australia
²Hewlett-Packard Laboratories, Filton Road, Stoke Gifford, Bristol BS34 8QZ, United Kingdom
³Theory Division, T-4, Los Alamos National Laboratory, Los Alamos, New Mexico 87544
⁴Department of Physics, University of Illinois, Urbana-Champaign, Illinois 61801

^*Email address: bill_munro@hp.com

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Vol. 64, Iss. 3 — September 2001

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