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arXiv 0909.2892cond-mat.mes-hall
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用有效自旋概念分析介观系统中的相干电荷输运

The effective spin concept to analyze coherent charge transport in mesoscopic systems

J. Wan, W. Liu, M. Cahay, V. Gasparian, S. Bandyopadhyay

摘要:

引入有效自旋的概念,研究介观系统中的相位相干电荷输运与自旋量子比特上的量子操作之间的数学和物理类比。当与布洛赫球概念相结合时,这种同构允许用自旋电子学和量子计算领域的研究人员更熟悉的语言来制定输运问题。我们重新铸造众所周知的问题,隧道通过一个三角形散射体,共振隧穿结构,超晶格结构,和弹性散射体阵列,在特定的幺正操作(旋转)的旋量布洛赫球的电荷隧穿和自旋量子比特幺正操作之间的协同作用。

英文摘要:

An effective spin concept is introduced to examine the mathematical and physical analogy between phase coherent charge transport in mesoscopic systems and quantum operations on spin based qubits. When coupled with the Bloch sphere concept, this isomorphism allows formulation of transport problems in a language more familiar to researchers in the field of spintronics and quantum computing. We exemplify the synergy between charge tunneling and spin qubit unitary operations by recasting well-known problems of tunneling through a delta scatterer, a resonant tunneling structure, a superlattice structure, and arrays of elastic scatterers, in terms of specific unitary operations (rotations) of a spinor on the Bloch sphere.

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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