论文标题
Josephson环调制器的挤压极限作为非分类参数放大器
Squeezing Limit of the Josephson Ring Modulator as a Non-Degenerate Parametric Amplifier
论文作者
论文摘要
两模式挤压真空状态是量子技术的关键组成部分。在微波域中，它们可以由约瑟夫森环调节仪产生，该调制器充当三波混合非分级参数放大器。在这里，我们求解了三种骨气模式的主方程，该模式用新颖的数值方法描述了约瑟夫森环调制器，以计算输出场的挤压，并在低信号功率下增益。我们表明，来自三波混合过程的三阶相互作用本质上限制并减少增益。由于我们的结果与其他基于一般腔的三波混合过程有关，因此这意味着任何非分类参数放大器都将在输出字段中具有内在的挤压极限。
Two-mode squeezed vacuum states are a crucial component of quantum technologies. In the microwave domain, they can be produced by Josephson ring modulator which acts as a three-wave mixing non-degenerate parametric amplifier. Here, we solve the master equation of three bosonic modes describing the Josephson ring modulator with a novel numerical method to compute squeezing of output fields and gain at low signal power. We show that the third-order interaction from the three-wave mixing process intrinsically limits squeezing and reduces gain. Since our results are related to other general cavity-based three-wave mixing processes, these imply that any non-degenerate parametric amplifier will have an intrinsic squeezing limit in the output fields.
