Universal Quantum Fluctuations of a Cavity Mode Driven by a Josephson Junction
Universal Quantum Fluctuations of a Cavity Mode Driven by a Josephson Junction
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DOI：
10.1103/physrevlett.111.247001
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发表时间：
2013-12-09
影响因子：
8.6
通讯作者：
Rimberg, A. J.
中科院分区：
文献类型：
--
作者：
Armour, A. D.;Blencowe, M. P.;Rimberg, A. J.
我们分析了与偏置电压约瑟夫森结耦合的超导腔的量子动力学。谐振腔在谐振时被强烈激发，其中穿过电路的库珀对损失的电压能量是谐振腔光子能量的倍数。我们发现，共振伴随着在广泛的参数范围内对腔体量子涨落的大幅压缩，并且能够识别系统中的涨落呈现普遍值的状态。
We analyze the quantum dynamics of a superconducting cavity coupled to a voltage-biased Josephson junction. The cavity is strongly excited at resonances where the voltage energy lost by a Cooper pair traversing the circuit is a multiple of the cavity photon energy. We find that the resonances are accompanied by substantial squeezing of the quantum fluctuations of the cavity over a broad range of parameters and are able to identify regimes where the fluctuations in the system take on universal values.