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Band structure of coupled Josephson junctions in the presence of a vortex

✍ Scribed by Ulrich Geigenmüller; Gerd Schön

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
330 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

We study the influence of an imposed vortex on the macroscopic quantum properties of a ring-shaped array of lowcapacitance Josephson junctions. The symmetry associated with the vortex position modifies the band structure. The lowest band becomes parabolic with a curvature reflecting the vortex mass, and the lowest band gaps vanish. Correspondingly the fundamental frequency of the Bloch oscillation is reduced.

📜 SIMILAR VOLUMES

Maximum velocity of a fluxon in a stack
Maximum velocity of a fluxon in a stack of coupled Josephson junctions
✍ E. Goldobin; B.A. Malomed; A.V. Ustinov 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 201 KB

Dynamics of a fluxon in a stack of inductively coupled long Josephson junctions is studied analytically and numerically. We demonstrate that the fluxon has a maximum velocity, which does not necessarily coincide with any of the characteristic Josephson plasma wave velocities. The maximum fluxon velo