Resonant Phase Matching of Josephson Junction Traveling Wave Parametric Amplifiers

作者:O'Brien Kevin; Macklin Chris; Siddiqi Irfan; Zhang Xiang*
来源:Physical Review Letters, 2014, 113(15): 157001.
DOI:10.1103/PhysRevLett.113.157001

摘要

We propose a technique to overcome phase mismatch in Josephson-junction traveling wave parametric amplifiers in order to achieve high gain over a broad bandwidth. Using "resonant phase matching," we design a compact superconducting device consisting of a transmission line with subwavelength resonant inclusions that simultaneously achieves a gain of 20 dB, an instantaneous bandwidth of 3 GHz, and a saturation power of -98 dBm. Such an amplifier is well suited to cryogenic broadband microwave measurements such as the multiplexed readout of quantum coherent circuits based on superconducting, semiconducting, or nanomechanical elements, as well as traditional astronomical detectors.

  • 出版日期2014-10-6