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arXiv quant-ph/9904096quant-phcond-mat.mes-hall
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使用量子点自旋和腔QED的量子信息处理

Quantum information processing using quantum dot spins and cavity-QED

A. Imamoglu, D. D. Awschalom, G. Burkard, D. P. DiVincenzo, D. Loss, M. Sherwin, A. Small

摘要:

半导体中的电子自旋自由度通常具有比其他相关时标长几个数量级的退相干时间。因此,基于局域电子自旋作为量子比特的固态量子计算机具有潜在的兴趣。在这里,提出了一种方案,实现两个遥远的量子点自旋之间的控制相互作用。有效的长程相互作用是由高精细度微腔的真空场介导的。利用经典激光场和腔模诱导的导带空穴拉曼跃迁,可以实现并行受控非操作和任意单量子比特旋转。光学技术也可以用来测量每个量子点的自旋状态。

英文摘要:

The electronic spin degrees of freedom in semiconductors typically have decoherence times that are several orders of magnitude longer than other relevant timescales. A solid-state quantum computer based on localized electron spins as qubits is therefore of potential interest. Here, a scheme that realizes controlled interactions between two distant quantum dot spins is proposed. The effective long-range interaction is mediated by the vacuum field of a high finesse microcavity. By using conduction-band-hole Raman transitions induced by classical laser fields and the cavity-mode, parallel controlled-not operations and arbitrary single qubit rotations can be realized. Optical techniques can also be used to measure the spin-state of each quantum dot.

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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