Ring wave solutions of a n+1-dimensional Sine-Gordon model |
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Authors: | Di Garbo A. Fronzoni L. Chillemi S. |
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Affiliation: | Istituto di Biofisica, CNR, via S. Lorenzo 26, 56127 Pisa, Italy. |
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Abstract: | The dynamical properties of the ring wave solutions of the model psi(tt)- nabla (n) (2)psi+sin psi+ varepsilon sin (psi/2)+alphapsi(t)=0 (0= varepsilon <1,0=alpha<1) are studied analytically and numerically for spatial dimension (n=2,3). The model is obtained as a continuum approximation of a multidimensional Frenkel-Kontorowa lattice. We will show that in the case varepsilon >0, alpha=0 (or alpha>0) the return effect of the ring wave does not occur only for well defined values of varepsilon. It will be shown numerically that the dissipative perturbation alphapsi(t) (alpha>0) stabilizes both the velocity and the wave profile of the ring wave when the return effect does not occur. (c) 1997 American Institute of Physics. |
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