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arXiv 0905.2490quant-ph
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交替耦合格式下的相干隧道绝热通道

Coherent Tunneling Adiabatic Passage with the Alternating Coupling Scheme

Lenneke M. Jong, Andrew D. Greentree, Vincent I. Conrad, Lloyd C. L Hollenberg, David N. Jamieson

摘要:

使用绝热通道技术来介导粒子通过真实空间而不是相空间的传输正在成为一种有趣的可能性。研究了交替隧穿矩阵元的相干隧穿绝热通道(CTAP)的性质。这种几何形状,以前没有考虑在硅范例中的施主,提供了一个有趣的远程量子传输的路线。我们介绍了简化的耦合协议,瞬态本征谱,以及一个现实的门设计这个运输协议。使用对具有30 nm施主间距、120 nm总链长的5施主器件的隧道耦合的成对处理,我们估计绝热操作所需的时间尺度为~ 70 ns,该时间完全在测量的电子自旋和估计的电荷弛豫以及硅中磷施主的时间内。

英文摘要:

The use of adiabatic passage techniques to mediate particle transport through real space, rather than phase space is becoming an interesting possibility. We have investigated the properties of Coherent Tunneling Adiabatic Passage (CTAP) with alternating tunneling matrix elements. This geometry, not previously considered in the donor in silicon paradigm, provides an interesting route to long-range quantum transport. We introduce simplified coupling protocols, and transient eigenspectra as well as a realistic gate design for this transport protocol. Using a pairwise treatment of the tunnel couplings for a 5 donor device with 30nm donor spacings, 120nm total chain length, we estimate the time scale required for adiabatic operation to be ~70ns, a time well within measured electron spin and estimated charge relaxation and times for phosphorus donors in silicon.

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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