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Spectral linewidths of Josephson oscillators
M Salerno1, M R Samuelsen, A V Yulin
1Department of Physics, The Technical University of Denmark, DK-2800 Kogens Lyngby, Denmark. salerno@sa.infn.it
Physical Review Letters
|June 1, 2001
Summary
The linewidth of Josephson flux-flow oscillators shares functional dependencies with other Josephson devices, suggesting a universal formula for linewidth across various Josephson oscillators.
Area of Science:
- Superconducting electronics
- Quantum device physics
Background:
- Josephson oscillators are crucial in quantum electronics.
- Understanding linewidth is key to device performance.
Purpose of the Study:
- To investigate the linewidth of Josephson flux-flow oscillators.
- To compare their linewidth dependence with other Josephson devices.
Main Methods:
- Experimental analysis of Josephson flux-flow oscillator linewidth.
- Comparison with theoretical models for Josephson single-fluxon oscillators and small Josephson junctions.
Main Results:
- The linewidth of Josephson flux-flow oscillators exhibits the same functional dependence on temperature, static, and dynamic resistances.
- This dependence mirrors that observed in Josephson single-fluxon oscillators and small Josephson junctions.
Conclusions:
- A universal formula for the linewidth of Josephson oscillators is proposed.
- This finding unifies the understanding of linewidth across different Josephson oscillator types.