Entanglement in SU(2)-invariant quantum systems: The positive partial transpose criterion and others

URN zum Zitieren dieses Dokuments: urn:nbn:de:bvb:355-epub-282313

Schliemann, John (2005) Entanglement in SU(2)-invariant quantum systems: The positive partial transpose criterion and others. Phys. Rev. A 72, 012307.

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Andere URL zum Volltext: http://link.aps.org/doi/10.1103/PhysRevA.72.012307, http://pra.aps.org/abstract/PRA/v72/i1/e012307

Zusammenfassung

We study entanglement in mixed bipartite quantum states which are invariant under simultaneous SU(2) transformations in both subsystems. Previous results on the behavior of such states under partial transposition are substantially extended. The spectrum of the partial transpose of a given SU(2)-invariant density matrix ρ is entirely determined by the diagonal elements of ρ in a basis of ...

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