Current responses and voltage fluctuations in Josephson-junction systems
Abstract
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.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- August 1998
- DOI:
- 10.1209/epl/i1998-00378-5
- arXiv:
- arXiv:cond-mat/9806364
- Bibcode:
- 1998EL.....43..439C
- Keywords:
-
- 74.50.+r;
- 74.25.Nf;
- 74.40.+k;
- Tunneling phenomena;
- point contacts weak links Josephson effects;
- Response to electromagnetic fields;
- Fluctuations;
- Condensed Matter
- E-Print:
- 4 pages, To appear in Europhys. Lett