SPIRAL MOTION IN A NOISY COMPLEX GINZBURG-LANDAU EQUATION

Authors
ARANSON IS CHATE H TANG LH
Citation
Is. Aranson et al., SPIRAL MOTION IN A NOISY COMPLEX GINZBURG-LANDAU EQUATION, Physical review letters, 80(12), 1998, pp. 2646-2649
Citations number
17
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
12
Year of publication
1998
Pages
2646 - 2649
Database
ISI
SICI code
0031-9007(1998)80:12<2646:SMIANC>2.0.ZU;2-X
Abstract
The response of spiral waves to external perturbations in a stable reg ime of the two-dimensional complex Ginzburg-Landau equation (CGLE) is investigated. It is shown that the spiral core has a finite mobility a nd performs Brownian motion when driven by white noise. Combined with simulation results, this suggests that defect-free and quasifrozen sta tes in the noiseless CGLE are susceptible to unpaired vortex excitatio n at any nonzero noise strength.