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arXiv 0909.5386quant-ph
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强光子数振荡压缩态的观测

Observation of squeezed states with strong photon number oscillations

Moritz Mehmet, Henning Vahlbruch, Nico Lastzka, Karsten Danzmann, Roman Schnabel

摘要:

光的压缩态在高精度测量领域(例如引力波探测)以及量子信息领域(例如用于量子计算网络中的隐形传态、量子密码学和纠缠分布)中构成重要的非经典资源。与高纯度、高带宽和高空间模式质量相结合的强压缩是期望的,以便实现与任何经典协议相比显著改进的性能。在这里,我们报告观察到的最强的压缩到目前为止的11.5分贝,连同前所未有的高状态纯度对应的真空贡献小于5%,和压缩带宽约170 MHz。我们的压缩态的分析揭示了一个显着的高阶量子相关光子对的生产,并存在强的光子数振荡。

英文摘要:

Squeezed states of light constitute an important nonclassical resource in the field of high-precision measurements, e.g. gravitational wave detection, as well as in the field of quantum information, e.g. for teleportation, quantum cryptography, and distribution of entanglement in quantum computation networks. Strong squeezing in combination with high purity, high bandwidth and high spatial mode quality is desirable in order to achieve significantly improved performances contrasting any classical protocols. Here we report on the observation of the strongest squeezing to date of 11.5 dB, together with unprecedented high state purity corresponding to a vacuum contribution of less than 5%, and a squeezing bandwidth of about 170 MHz. The analysis of our squeezed states reveals a significant production of higher-order pairs of quantum-correlated photons, and the existence of strong photon number oscillations.

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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