用于量子相干信号处理的约瑟夫森行波参量放大器

2019 IEEE MTT-S International Microwave Symposium (IMS) Pub Date : 2019-06-02 DOI:10.1109/mwsym.2019.8700875

M. Haider, J. Russer, Jesus Abundis Patino, C. Jirauschek, P. Russer

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引用次数: 2

摘要

约瑟夫森行波参量放大器实现了射电天文学中微波光子的超灵敏探测和超导量子比特的实时读出。为了获得较大的增益，需要使放大器与非线性的相互作用时间最大化。行波参数放大器通过提供较长的传播路径表现出较长的交互时间，从而比其他微波参数放大器具有更大的增益和更高的带宽。简并约瑟夫森参数放大器(DJPA)低于参数振荡阈值时，产生压缩真空态，高于阈值时存在第二分岔点，该分岔点产生幅值压缩辐射。

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A Josephson Traveling Wave Parametric Amplifier for Quantum Coherent Signal Processing

Josephson traveling wave parametric amplifiers have enabled ultra-sensitive detection of microwave photons in radio astronomy and real-time readout of superconducting quantum bits. To achieve a large gain, the interaction time with the non-linearity of the amplifier needs to be maximized. Traveling wave parametric amplifiers exhibit long interaction times by providing long propagation paths, enabling a greater gain and higher bandwidths than other microwave parametric amplifiers. In the case of the degenerate Josephson parametric amplifier (DJPA) below threshold of parametric oscillation, a squeezed vacuum state can be generated, and above threshold a second bifurcation point exists, where the device generates amplitude squeezed radiation.

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2019 IEEE MTT-S International Microwave Symposium (IMS)

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