Frequency-tunable superconducting resonators via nonlinear kinetic inductance
- National Institute of Standards and Technology, Boulder, Colorado 80305 (United States)
- Department of Physics, Stanford University, Stanford, California 94305 (United States)
- Department of Physics, University of California, Santa Barbara, California 93106 (United States)
We have designed, fabricated, and tested a frequency-tunable high-Q superconducting resonator made from a niobium titanium nitride film. The frequency tunability is achieved by injecting a DC through a current-directing circuit into the nonlinear inductor whose kinetic inductance is current-dependent. We have demonstrated continuous tuning of the resonance frequency in a 180 MHz frequency range around 4.5 GHz while maintaining the high internal quality factor Q{sub i} > 180 000. This device may serve as a tunable filter and find applications in superconducting quantum computing and measurement. It also provides a useful tool to study the nonlinear response of a superconductor. In addition, it may be developed into techniques for measurement of the complex impedance of a superconductor at its transition temperature and for readout of transition-edge sensors.
- OSTI ID:
- 22489091
- Journal Information:
- Applied Physics Letters, Vol. 107, Issue 6; 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
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DESIGN
DIRECT CURRENT
FILMS
FILTERS
GHZ RANGE 01-100
INDUCTANCE
MHZ RANGE 100-1000
NIOBIUM
NONLINEAR PROBLEMS
QUALITY FACTOR
QUANTUM COMPUTERS
READOUT SYSTEMS
RESONATORS
SOLENOIDS
SUPERCONDUCTORS
TITANIUM
TRANSITION TEMPERATURE