Majorization criterion for distillability of a bipartite quantum state

Details Majorization criterion for distillability of a bipartite quantum state Majorization criterion for distillability of a bipartite quantum state

2003-03-11

arxiv.org/abs/quant-ph/0303057v3

.Phys. Rev. Lett. 91, 057902 (2003)

Physics

Quantum Physics

4 pages, no figures, REVTEX. A new lemma (Lemma 2) added. To appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.91.057902

Bipartite quantum states are classified into three categories: separable states, bound entangled states, and free entangled states. It is of great importance to characterize these families of states for the development of quantum information science. In this paper, I show that the separable states and the bound entangled states have a common spectral property. More precisely, I prove that for undistillable -- separable and bound entangled -- states, the eigenvalue vector of the global system is majorized by that of the local system. This result constitutes a new sufficient condition for distillability of bipartite quantum states. This is achieved by proving that if a bipartite quantum state satisfies the reduction criterion for distillability, then it satisfies the majorization criterion for separability.

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