Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3653473
Keywords
Josephson effect; microstrip resonators; microwave amplifiers; modulators; power measurement; superconducting resonators
Categories
Funding
- NSF [DMR-0653377]
- NSA through ARO [W911NF-09-1-0514]
- IARPA under ARO [W911NF-09-1-0369]
- Keck foundation
- Agence Nationale pour la Recherche [ANR07-CEXC-003]
Ask authors/readers for more resources
We report on measurements of a Josephson amplifier (J-amp) suitable for quantum-state qubit readout in the microwave domain. It consists of two microstrip resonators which intersect at a Josephson ring modulator. A maximum gain of about 20 dB, a bandwidth of 9 MHz, and a center-frequency tunability of about 60 MHz with gain in excess of 10 dB have been attained for idler and signal of frequencies 6.4 GHz and 8.1 GHz, in accordance with theory. Maximum input power measurements of the J-amp show a relatively good agreement with theoretical prediction. We discuss how the amplifier characteristics can be improved. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3653473]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available