| Issue |
Europhys. Lett.
Volume 43, Number 4, August II 1998
|
|
|---|---|---|
| Page(s) | 439 - 444 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00378-5 | |
| Published online | 01 September 2002 | |
Current responses and voltage fluctuations in Josephson-junction systems
1
Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
2
Department of Physics and Center for Theoretical Physics, Seoul National University, Seoul 151-742, Korea
Received:
30
March
1998
Accepted:
23
June
1998
We consider arrays of Josephson junctions as well as single junctions in both the classical and quantum-mechanical regimes, and examine the generalized (frequency-dependent) resistance, which describes the dynamic responses of such Josephson-junction systems to external currents. It is shown that the generalized resistance and the power spectrum of voltage fluctuations are related via the fluctuation-dissipation theorem. Implications of the obtained relations are also discussed in various experimental situations.
PACS: 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects / 74.25.Nf – Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) / 74.40.+k – Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)
© EDP Sciences, 1998
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