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arXiv quant-ph/0506156quant-phcond-mat.mes-hall
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模式纠缠表征的量子态转移

Quantum State Transfer Characterized by Mode Entanglement

Xiao-Feng Qian, Ying Li, Yong Li, Z. Song, C. P. Sun

摘要:

在考虑模式纠缠的情况下,研究了一类具有镜像对称性的紧键布洛赫电子系统的量子态转移。镜像模纠缠度(MMC)是一种用于度量具有一定空间对称性的模纠缠度的概念,它是一个合适的波函数与其镜像的重叠,通过对MMC的研究,揭示了QST的保真度与MMC之间的内在联系.发现了互补性,因为最大保真度伴随着最小MMC。在完成理想QST所需的特征时间的一半的瞬间,MMC可以达到其最大值1。发现了一大类具有一定谱结构的完美QST模型来支持我们的分析结果。

英文摘要:

We study the quantum state transfer (QST) of a class of tight-bonding Bloch electron systems with mirror symmetry by considering the mode entanglement. Some rigorous results are obtained to reveal the intrinsic relationship between the fidelity of QST and the mirror mode concurrence (MMC), which is defined to measure the mode entanglement with a certain spatial symmetry and is just the overlap of a proper wave function with its mirror image. A complementarity is discovered as the maximum fidelity is accompanied by a minimum of MMC. And at the instant, which is just half of the characteristic time required to accomplish a perfect QST, the MMC can reach its maximum value one. A large class of perfect QST models with a certain spectrum structure are discovered to support our analytical results.

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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