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arXiv quant-ph/9808030quant-ph
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不可扩乘积基与束缚纠缠

Unextendible Product Bases and Bound Entanglement

C. H. Bennett, D. P. DiVincenzo, T. Mor, P. W. Shor, J. A. Smolin, B. M. Terhal

摘要:

多体量子系统的不可扩展乘积基(UPB)是一种不完全正交乘积基,其补子空间不含乘积态。我们给出了UPB的例子,并证明了与任意UPB互补的子空间上的均匀混合态是束缚纠缠态。我们给出了一个三重2x2x2 UPB,它的互补混合态有三重纠缠,但没有二分纠缠,即所有三个相应的2x4二分混合态都是无纠缠的。我们发现,UPB的成员是不完全区分本地POVM和经典的通信。

英文摘要:

An unextendible product basis (UPB) for a multipartite quantum system is an incomplete orthogonal product basis whose complementary subspace contains no product state. We give examples of UPBs, and show that the uniform mixed state over the subspace complementary to any UPB is a bound entangled state. We exhibit a tripartite 2x2x2 UPB whose complementary mixed state has tripartite entanglement but no bipartite entanglement, i.e. all three corresponding 2x4 bipartite mixed states are unentangled. We show that members of a UPB are not perfectly distinguishable by local POVMs and classical communication.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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