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arXiv quant-ph/0505139quant-ph
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用于量子信息处理的最佳光子

Optimal photons for quantum information processing

Peter P. Rohde, Timothy C. Ralph, Michael A. Nielsen

摘要:

光子量子信息处理方案,例如线性光学量子计算和其他依赖于单光子干涉的实验,固有地需要完全的光子不可干涉性,以使期望的光子相互作用能够发生。模式失配是光路中光子可复用性的主要原因。本文研究了线性光路中光子波包形状对模失配效应容限的影响,指出大带宽的高斯分布光子是最佳的。结果是一般的,并适用于任意线性光路,包括允许后选择和经典前馈。

英文摘要:

Photonic quantum information processing schemes, such as linear optics quantum computing, and other experiments relying on single-photon interference, inherently require complete photon indistinguishability to enable the desired photonic interactions to take place. Mode-mismatch is the dominant cause of photon distinguishability in optical circuits. Here we study the effects of photon wave-packet shape on tolerance against the effects of mode-mismatch in linear optical circuits, and show that Gaussian distributed photons with large bandwidth are optimal. The result is general and holds for arbitrary linear optical circuits, including ones which allow for post-selection and classical feed-forward.

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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