电子纠缠态的电荷-自旋转换与无自旋相互作用固态量子计算
Charge-to-spin conversion of electron entanglement states and spin-interaction-free solid-state quantum computation
摘要：
在不借助自旋-自旋耦合的情况下，我们提出了一种基于半导体多量子点结构的可扩展自旋量子计算方案。利用单电子跃迁技术和量子点元胞自动机（QCA）的纳米结构，产生两个电子的电荷纠缠态，然后利用单自旋旋转将其转换为自旋纠缠态.确定性的两量子位量子门也操纵使用只有单自旋旋转的帮助下QCA。通过将多点结构耦合到量子点接触，可以执行自旋状态的单次读出。因此，在半导体纳米结构中可以实现确定性的无自旋相互作用的量子计算。
英文摘要：
Without resorting to spin-spin coupling, we propose a scalable spin quantum computing scheme assisted with a semiconductor multiple-quantum-dot structure. The techniques of single electron transitions and the nanostructure of quantum-dot cellular automata (QCA) are used to generate charge entangled states of two electrons, which are then converted into spin entanglement states using single-spin rotations only. Deterministic two-qubit quantum gates are also manipulated using only single-spin rotations with the help of QCA. A single-shot readout of spin states can be carried out by coupling the multiple dot structure to a quantum point contact. As a result, deterministic spin-interaction-free quantum computing can be implemented in semiconductor nanostructure.
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