Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 15, 2015
- Source ID
- 10.1063/1.4922348
Entities
People
- A. Dunsworth
- A. Megrant
- A. Vainsencher
- B. Campbell
- B. Chiaro
- Charles Neill
- D. Sank
- E. Jeffrey
- I.-C. Hoi
- J. Y. Mutus
- James F. Kelly
- James Wenner
- Jian Gao
- John M. Martinis
- P. J. J. O'malley
- P. Roushan
- R. Barends
- Santanu Chaudhuri
- T. C. White
- Yu Chen
- Zexun Chen
Organizations
- Army Research Office
- National Institute of Standards and Technology
- Stanford University
- University of California