Photon cross-correlations emitted by a Josephson junction in two microwave cavities
Photon cross-correlations emitted by a Josephson junction in two microwave cavities
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DOI：
10.1103/physrevb.92.014503
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发表时间：
2015-03
影响因子：
3.7
通讯作者：
M. Trif;P. Simon
中科院分区：
文献类型：
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作者：
M. Trif;P. Simon
我们研究了与两个频率不相称的谐振器耦合的偏压约瑟夫森结。用密度方法分析腔场，用输入-输出描述分析发射光子通量及其关联函数，结果表明，无论是对于无限带宽探测器还是有限带宽探测器，发射的辐射都是非经典的，因为相关器违反了Cauchy-Schwarz不等式。我们还研究了光子关联的时间依赖性，结果表明，随着发射率从阈值以下的增加，关联的线宽变窄。
We study a voltage biased Josephson junction coupled to two resonators of incommensurate frequencies. Using a density approach to analyze the cavity fields and an input-output description to analyze the emitted photonic fluxes and their correlation functions, we have shown, both for infinite and finite bandwidth detectors, that the emitted radiation is non-classical in the sense that the correlators violates Cauchy-Schwarz inequalities. We have also studied the time dependence of the photonic correlations and showed that their line-width becomes narrower with the increase of the emission rate approaching from below the threshold limit.