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arXiv quant-ph/0203145quant-ph
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耦合量子点嵌入光学微腔的量子计算

Quantum computation with coupled-quantum-dots embedded in optical microcavities

Xin-Qi Li, YiJing Yan

摘要:

基于电荷态的空间分离可以增强量子相干性的思想,我们提出了一种利用两个耦合量子点构造量子比特的量子计算方案。量子信息存储在电子-空穴对态中,电子和空穴位于不同的点上,这使得量子比特态具有很长的寿命。通过腔光子耦合量子点,可以实现任意量子比特对的通用量子门,腔光子有望成为远程信息传输的候选者。通过估计门时间与退相干时间的关系进行了操作分析。

英文摘要:

Based on an idea that spatial separation of charge states can enhance quantum coherence, we propose a scheme for quantum computation with quantum bit (qubit) constructed from two coupled quantum dots. Quantum information is stored in electron-hole pair state with the electron and hole locating in different dots, which enables the qubit state being very long-lived. Universal quantum gates involving any pair of qubits are realized by coupling the quantum dots through cavity photon which is a hopeful candidate to transfer long-range information. Operation analysis is carried out by estimating the gate time versus the decoherence time.

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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