Resonant phase matching of Josephson junction traveling wave parametric amplifiers.
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.
Nanoscale Science and Engineering Center, University of California, Berkeley, California 94720, USA.
Kevin
K
O'Brien
Department of Physics, University of California, Quantum Nanoelectronics Laboratory, Berkeley, California 94720, USA.
Chris
C
Macklin
Department of Physics, University of California, Quantum Nanoelectronics Laboratory, Berkeley, California 94720, USA.
Irfan
I
Siddiqi
Nanoscale Science and Engineering Center, University of California, Berkeley, California 94720, USA and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Xiang
X
Zhang