Time dilation of a bound half-fluxon pair in a long Josephson junction with a ferromagnetic insulator

Details Time dilation of a bound half-fluxon pair in a long Josephson junction with a ferromagnetic insulator Time dilation of a bound half-fluxon pair in a long Josephson junction with a ferromagnetic insulator

2007-10-04

arxiv.org/abs/0710.0947v1

Phys. Rev. Lett. 99, 207004 (2007)

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.99.207004

The fluxon dynamics in a long Josephson junction with a ferromagnetic insulating layer is investigated. It is found that the Josephson phase obeys a double sine-Gordon equation involving a bound pi fluxon solution, and the internal oscillations of the bound pair acting as a clock exhibit Lorentz reductions in their frequencies regarded as a relativistic effect in the time domain, i.e., time dilation. This is the complement to the Lorentz contraction of fluxons with no clock. A possible observation scheme is also discussed.

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