2009-Gulevich-PhysRevB.80.094509.pdf (4.09 MB)
Shape and wobbling wave excitations in Josephson junctions: exact solutions of the (2+1)-dimensional sine-Gordon model
journal contribution
posted on 2013-07-16, 10:59 authored by D Gulevich, Feodor Kusmartsev, Sergey SavelievSergey Saveliev, V.A. Yampol'skii, Franco NoriWe predict a class of excitations propagating along a Josephson vortex in two-dimensional Josephson junctions. These excitations are associated with the distortion of a Josephson vortex line of an arbitrary profile. We derive a universal analytical expression for the energy of arbitrary-shape excitations, investigate their influence on the dynamics of a vortex line, and discuss conditions where such excitations can be created. Finally, we show that such excitations play the role of a clock for a relativistically-moving Josephson vortex and suggest an experiment to measure a time-dilation effect analogous to that in special relativity. The position of the shape excitation on a Josephson vortex acts like a “minute hand” showing the time in the rest frame associated with the vortex. Remarkably, at some conditions, the shape wave can carry negative energy: a vortex with the shape excitation can have less energy than the same vortex without it.
History
School
- Science
Department
- Physics
Citation
GULEVICH, D.R. ... et al, 2009. Shape and wobbling wave excitations in Josephson junctions: exact solutions of the (2+1)-dimensional sine-Gordon model. Physical Review B, 80 (094509), 13pp.Publisher
© American Physical SocietyVersion
- VoR (Version of Record)
Publication date
2009ISSN
1098-0121Publisher version
Language
- en