A Geometric Diagram of Separable States

Details A Geometric Diagram of Separable States A Geometric Diagram of Separable States

2004-03-02

arxiv.org/abs/quant-ph/0403015v1

Physics

Quantum Physics

4 pages, no figures

Scientific paper

This paper present a geometric diagram of a separable state: If a mixed state $\sigma $ is separable, there are $2^{nS(\sigma)}$ linearly independant product vectors which span the same Hilbert space as the $2^{nS(\sigma)}$ ``likely'' strings of $\sigma ^{\otimes n}$ do. This diagram results in a criterion for separability which is strictly stronger than the inorder criterion in [M.A. Nielsen and J. Kempe, Phys. Rev. Lett. 86, 5184 (2001)]. This means that the number of product bases of states of a system has close link to the nonlocality of the system.

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