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arXiv 0811.4756quant-phphysics.ao-phphysics.optics
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相干偏振态自由空间量子密钥分发的可行性

Feasibility of free space quantum key distribution with coherent polarization states

D. Elser, T. Bartley, B. Heim, Ch. Wittmann, D. Sych, G. Leuchs

摘要:

我们首次证明了在真实大气条件下利用连续变量进行自由空间量子密钥分发的可行性。更具体地说,我们在我们研究所大楼的屋顶上通过100米的自由空间信道传输相干偏振态。在我们的方案中,信号和本地振荡器结合在一个单一的空间模式,自动补偿大气波动,并在一个良好的干扰结果。此外,本地振荡器充当空间和光谱滤波器,从而允许不受限制的日光操作。

英文摘要:

We demonstrate for the first time the feasibility of free space quantum key distribution with continuous variables under real atmospheric conditions. More specifically, we transmit coherent polarization states over a 100m free space channel on the roof of our institute's building. In our scheme, signal and local oscillator are combined in a single spatial mode which auto-compensates atmospheric fluctuations and results in an excellent interference. Furthermore, the local oscillator acts as spatial and spectral filter thus allowing unrestrained daylight operation.

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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