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arXiv 1107.0211cond-mat.mes-hall
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相互作用量子点中单空穴和双空穴自旋的光学控制

Optical control of one and two hole spins in interacting quantum dots

Alex Greilich, Samuel G. Carter, Danny Kim, Allan S. Bracker, Daniel Gammon

摘要:

半导体量子点中的单空穴自旋已经成为潜在地优于电子自旋的量子比特。空穴的一个关键特征是它们与核自旋的超精细相互作用大大减少,这是研究电子自旋的最大困难之一。现在必须通过展示快速量子门和可扩展性来证明空穴对于量子信息处理是可行的。为此,我们已经开发了InAs/GaAs量子点耦合通过相干隧穿和控制数量的孔收费。我们报告快速,单量子比特门使用短激光脉冲序列。然后,我们通过光学控制两个相互作用的空穴在不同的点上的自旋,朝着量子信息的可扩展性迈出了重要的下一步。

英文摘要:

A single hole spin in a semiconductor quantum dot has emerged as a quantum bit that is potentially superior to an electron spin. A key feature of holes is that they have a greatly reduced hyperfine interaction with nuclear spins, which is one of the biggest difficulties in working with an electron spin. It is now essential to show that holes are viable for quantum information processing by demonstrating fast quantum gates and scalability. To this end we have developed InAs/GaAs quantum dots coupled through coherent tunneling and charged with controlled numbers of holes. We report fast, single qubit gates using a sequence of short laser pulses. We then take the important next step toward scalability of quantum information by optically controlling two interacting hole spins in separate dots.

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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