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Artículo
Resonances in the dynamics of f 4 kinks perturbed by ac forces
(2000)
We study the dynamics of f 4 kinks perturbed by an ac force, both with and without damping. We address this issue by using a collective coordinate theory, which allows us to reduce the problem to the dynamics of the kink ...
Artículo
Existence of internal modes of sine-Gordon kinks [Rapid Communications]
(2000)
We study whether or not sine-Gordon kinks exhibit internal modes or ‘‘quasimodes.’’ By considering the response of the kinks to ac forces and initial distortions, we show that neither intrinsic internal modes nor ‘‘quasimodes’’ ...
Artículo
Reply to “Comment on ‘Existence of internal modes of sine-Gordon kinks’ ”
(2006)
In this reply to the comment by C. R. Willis, we show, by quoting his own statements, that the simulations reported in his original work with Boesch [Phys. Rev. B 42, 2290 (1990)] were done for kinks with nonzero initial ...
Artículo
Internal Mode Mechanism for Collective Energy Transport in Extended Systems
(2003)
We study directed energy transport in homogeneous nonlinear extended systems in the presence of homogeneous ac forces and dissipation. We show that the mechanism responsible for unidirectional motion of topological excitations ...
Artículo
Soliton ratchets in homogeneous nonlinear Klein-Gordon systems
(2006)
We study in detail the ratchetlike dynamics of topological solitons in homogeneous nonlinear Klein-Gordon systems driven by a biharmonic force. By using a collective coordinate approach with two degrees of freedom, namely ...
Artículo
Overdamped sine-Gordon kink in a thermal bath
(1999)
We study sine-Gordon kink diffusion at finite temperature in the overdamped limit. By means of a general perturbative approach, we calculate the first- and second-order ~ in temperature ! contributions to the ...
Artículo
Anomalous Resonance Phenomena of Solitary Waves with Internal Modes
(2000)
We investigate the nonparametric, pure ac driven dynamics of nonlinear Klein-Gordon solitary waves having an internal mode of frequency Ωi. We show that the strongest resonance arises when the driving frequency δ=Ωi/2, ...
Artículo
Anomalies of ac driven solitary waves with internal modes: Nonparametric resonances induced by parametric forces
(2001)
We study the dynamics of kinks in the φ4 model subjected to a parametric ac force, both with and without damping, as a paradigm of solitary waves with internal modes. By using a collective coordinate approach, we find that ...