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arXiv quant-ph/0504062quant-ph
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分布微腔中参量下转换产生纯态单光子波包

Pure-state single-photon wave-packet generation by parametric down conversion in a distributed microcavity

M. G. Raymer, Jaewoo Noh, K. Banaszek, I. A. Walmsley

摘要:

我们提出了一种光参量下转换(PDC)方案,该方案不会在单光子波包的状态纯度和包产生速率之间进行权衡。这是通过使用微腔来设计PDC频率下的光场的状态密度来修改PDC工艺来实现的。高精细度腔模式占据比脉冲泵浦激光场的带宽窄得多的光谱间隔,抑制了信号光子和闲频光子之间的光谱相关或纠缠。场的光谱过滤发生在光子产生之前,而不是像大多数其他方案那样发生在光子产生之后。通过求解算符麦克斯韦方程组,得到了双光子态的Schmidt模分解。超过99%的纯态数据包生产预计是可以实现的。

英文摘要:

We propose an optical parametric down conversion (PDC) scheme that does not suffer a trade-off between the state-purity of single-photon wave-packets and the rate of packet production. This is accomplished by modifying the PDC process by using a microcavity to engineer the density of states of the optical field at the PDC frequencies. The high-finesse cavity mode occupies a spectral interval much narrower than the bandwidth of the pulsed pump laser field, suppressing the spectral correlation, or entanglement, between signal and idler photons. Spectral filtering of the field occurs prior to photon creation rather than afterward as in most other schemes. Operator-Maxwell equations are solved to find the Schmidt-mode decomposition of the two-photon states produced. Greater than 99% pure-state packet production is predicted to be achievable.

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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