Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4922348· OSTI ID:22412578

White, T. C.; Mutus, J. Y.; Hoi, I. -C.; Barends, R.; Campbell, B.; Chen, Yu; Chen, Z.; Chiaro, B.; Dunsworth, A.; Jeffrey, E.; Kelly, J.; Neill, C.; O'Malley, P. J. J.; Roushan, P.; Sank, D.; Vainsencher, A.; Wenner, J.; Megrant, A. ^[1]; Chaudhuri, S. ^[2]; others, and

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1. Department of Physics, University of California, Santa Barbara, California 93106-9530 (United States)
2. Department of Physics, Stanford University, Stanford, California 94305 (United States)

Josephson parametric amplifiers have become a critical tool in superconducting device physics due to their high gain and quantum-limited noise. Traveling wave parametric amplifiers (TWPAs) promise similar noise performance, while allowing for significant increases in both bandwidth and dynamic range. We present a TWPA device based on an LC-ladder transmission line of Josephson junctions and parallel plate capacitors using low-loss amorphous silicon dielectric. Crucially, we have inserted λ/4 resonators at regular intervals along the transmission line in order to maintain the phase matching condition between pump, signal, and idler and increase gain. We achieve an average gain of 12 dB across a 4 GHz span, along with an average saturation power of −92 dBm with noise approaching the quantum limit.

• OSTI ID: 22412578
• Journal Information: Applied Physics Letters, Vol. 106, Issue 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DIELECTRIC MATERIALS
GHZ RANGE 01-100
JOSEPHSON JUNCTIONS
PARAMETRIC AMPLIFIERS
RESONATORS
SILICON
SUPERCONDUCTING DEVICES
TRAVELLING WAVES