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arXiv quant-ph/0612160quant-ph
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耗散条件下绝热通过的两量子比特条件相位门替代方案

Alternative scheme for two-qubit conditional phase gate by adiabatic passage under dissipation

Z. J. Deng, K. L. Gao, F. Mang

摘要:

我们检查最近的一个建议[H。Goto和K。Ichimura Phys. Rev. A 70,012305(2004)]中描述的方法,用于在自发发射和腔衰减的影响下通过绝热通道的受控相位门。我们证明了上述建议的修改可以用于在两量子比特Grover搜索中生成必要的条件相位门。在门控期间没有来自原子激发态和腔模的光子泄漏的条件下,数值分析了绝热通过的两量子比特条件相位门的成功概率和保真度.我们提出的门控方案和以前的方案之间的比较表明,Goto和Ichimura的方案是一种替代的和可行的方式在光学腔制度的两个量子位门,并可以推广到多量子位门的原则。

英文摘要:

We check a recent proposal [H. Goto and K. Ichimura Phys. Rev. A 70, 012305 (2004)] for controlled phase gate through adiabatic passage under the influence of spontaneous emission and the cavity decay. We show a modification of above proposal could be used to generate the necessary conditional phase gates in the two-qubit Grover search. Conditioned on no photon leakage either from the atomic excited state or from the cavity mode during the gating period, we numerically analyze the success probability and the fidelity of the two-qubit conditional phase gate by adiabatic passage. The comparison made between our proposed gating scheme and a previous one shows that Goto and Ichimura's scheme is an alternative and feasible way in the optical cavity regime for two-qubit gates and could be generalised in principle to multi-qubit gates.

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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