Isotopically engineered silicon/silicon-germanium nanostructures as basic elements for a nuclear spin quantum computer
Isotopically engineered silicon/silicon-germanium nanostructures as basic elements for a nuclear spin quantum computer
复制标题
同位素工程硅/硅锗纳米结构作为核自旋量子计算机的基本元件
DOI：
10.1088/0953-8984/13/26/319
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
I. D. Vagner
中科院分区：
文献类型：
--
作者：
I. Shlimak;V. Safarov;I. D. Vagner;I. D. Vagner
量子计算的概念是高科技领域最有前途的最新发展，而量子计算机的实验实现则构成了巨大的挑战。在所提出的模型中，特别有吸引力的是基于半导体的核自旋量子计算机（S-NSQCs），其中核自旋被用作与电子自旋和轨道动力学耦合的量子自旋元素（“量子比特”）。在这里，我们提出了一个计划，实现现代纳米技术的成就内的基本要素S-NSQCs。这些元素预计将基于核自旋控制的同位素工程Si/SiGe异质结，因为在这些半导体中，人们可以通过设计同位素组成来改变核自旋的丰度。提出了一种具体的装置，它允许人们使用核自旋磁态的电检测技术在量子水平上模拟记录、阅读和信息传输的过程。对于具有相对少量的核的半导体系统，这种技术的改进可能适用于在未来的S-NSQCs中操纵核自旋“量子比特”。
The idea of quantum computation is the most promising recent development in the high-tech domain, while experimental realization of a quantum computer poses a formidable challenge. Among the proposed models especially attractive are semiconductor based nuclear spin quantum computers (S-NSQCs), where nuclear spins are used as quantum bistable elements, `qubits', coupled to the electron spin and orbital dynamics. We propose here a scheme for implementation of basic elements for S-NSQCs which are realizable within achievements of the modern nanotechnology. These elements are expected to be based on a nuclear-spin-controlled isotopically engineered Si/SiGe heterojunction, because in these semiconductors one can vary the abundance of nuclear spins by engineering the isotopic composition. A specific device is suggested, which allows one to model the processes of recording, reading and information transfer on a quantum level using the technique of electrical detection of the magnetic state of nuclear spins. Improvement of this technique for a semiconductor system with a relatively small number of nuclei might be applied to the manipulation of nuclear spin `qubits' in the future S-NSQCs.