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arXiv 1010.4777quant-ph
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对称态的几何纠缠与Majorana表象

Geometric Entanglement of Symmetric States and the Majorana Representation

Martin Aulbach, Damian Markham, Mio Murao

摘要:

置换对称量子态出现在各种物理情况下,它们已经被提出用于量子信息任务。本文建立在[New J. Phys. 12,073025(2010)]的结果基础上,其中探索了多达12个量子比特的最大纠缠对称态,并且通过数值和分析方法确定了它们的几何纠缠量。对于这一点,Majorana表示,布洛赫球表示的推广,可以用来表示对称的n个量子比特状态的n个点上的表面上的单位球。这种点分布的对称性简化了纠缠的确定,并使量子态的研究成为可能。在这里,它表明,柏拉图固体的对偶关系有一个对应的Majorana表示,并在一般情况下,最大纠缠对称态既不对应于反相干自旋态,也不球形设计。讨论了对称态作为基于测量的量子计算资源的可用性。

英文摘要:

Permutation-symmetric quantum states appear in a variety of physical situations, and they have been proposed for quantum information tasks. This article builds upon the results of [New J. Phys. 12, 073025 (2010)], where the maximally entangled symmetric states of up to twelve qubits were explored, and their amount of geometric entanglement determined by numeric and analytic means. For this the Majorana representation, a generalization of the Bloch sphere representation, can be employed to represent symmetric n qubit states by n points on the surface of a unit sphere. Symmetries of this point distribution simplify the determination of the entanglement, and enable the study of quantum states in novel ways. Here it is shown that the duality relationship of Platonic solids has a counterpart in the Majorana representation, and that in general maximally entangled symmetric states neither correspond to anticoherent spin states nor to spherical designs. The usability of symmetric states as resources for measurement-based quantum computing is also discussed.

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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