5 papers · 1 filter
Defect Motion and Lattice Pinning Barrier in Josephson-Junction Ladders
H. Kang, Jong Soo Lim, J. -Y. Fortin +2
We study motion of domain wall defects in a fully frustrated Josephson-unction ladder system, driven by small applied currents. For small system sizes, the energy barrier E_B to th…
Stability of thermodynamic and dynamical order in a system of globally coupled rotors
J. Choi, M. Y. Choi
A system of globally coupled rotors is studied in a unified framework of microcanonical and canonical ensembles. We consider the Fokker-Planck equation governing the time evolution…
Critical currents for vortex defect motion in superconducting arrays
Jong Soo Lim, M. Y. Choi, Beom Jun Kim +1
We study numerically the motion of vortices in two-dimensional arrays of resistively shunted Josephson junctions. An extra vortex is created in the ground states by introducing nov…
Dynamic model of fiber bundles
M. Y. Choi, J. Choi, B. -G. Yoon
A realistic continuous-time dynamics for fiber bundles is introduced and studied both analytically and numerically. The equation of motion reproduces known stationary-state results…
Stability and ensemble inequivalence in a globally coupled system
M. Y. Choi, J. Choi
We consider a system of globally coupled rotors, described by a set of Langevin equations, and examine stability of the incoherent phase. The corresponding Fokker-Planck equation,…