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arXiv 1612.06337cond-mat.mes-hall
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相干导体的非经典辐射

Non-Classical Radiation Emission By A Coherent Conductor

Jean-Charles Forgues, Christian Lupien, Bertrand Reulet

摘要:

我们报告的实验证据表明,微波电磁场产生的正常导体,这里的隧道结放置在超低温下,可以是非经典的。通过测量在GHz范围内的一个或两个频率的电磁场的求积,我们证明了这种辐射中压缩和纠缠的存在。在一个实验中,我们观察到由结产生的光辅助噪声的一个正交的方差低于其真空水平。在第二个实验中,我们证明了在两个频率下的求积之间存在相关性,这可能比经典力学所允许的更强,证明了这两个频率下的辐射是纠缠的。

英文摘要:

We report experimental evidence that the microwave electromagnetic field generated by a normal conductor, here a tunnel junction placed at ultra-low temperature, can be non-classical. By measuring the quadratures of the electromagnetic field at one or two frequencies in the GHz range, we demonstrate the existence of squeezing as well as entanglement in such radiation. In one experiment, we observe that the variance of one quadrature of the photo-assisted noise generated by the junction goes below its vacuum level. In the second experiment, we demonstrate the existence of correlations between the quadratures taken at two frequencies, which can be stronger than allowed by classical mechanics, proving that the radiation at those two frequencies are entangled.

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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