Phys. Rev. A 68, 022318 (2003) [5 pages]

Entanglement, mixedness, and spin-flip symmetry in multiple-qubit systems

Abstract

References

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Gregg Jaeger¹, Alexander V. Sergienko^1,2, Bahaa E. A. Saleh¹, and Malvin C. Teich^1,2
¹Quantum Imaging Laboratory, Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts 02215, USA
²Department of Physics, Boston University, Boston, Massachusetts 02215, USA

Received 14 May 2003; published 27 August 2003

A relationship between a recently introduced multipartite entanglement measure, state mixedness, and spin-flip symmetry is established for any finite number of qubits. It is also shown that, for those classes of states invariant under the spin-flip transformation, there is a complementarity relation between multipartite entanglement and mixedness. A number of example classes of multiple-qubit systems are studied in light of this relationship.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.68.022318

DOI:

10.1103/PhysRevA.68.022318

PACS:

03.67.-a, 03.65.Ta, 42.79.Ta

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Phys. Rev. A 68, 022318 (2003) [5 pages]

Entanglement, mixedness, and spin-flip symmetry in multiple-qubit systems