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00925njm 22002777a 4500 dc Cao García, Francisco Javier author Zamora-Sillero, Elias author Quintero, Niurka R. author 2006 We study the effects on the dynamics of kinks due to expansions and contractions of the space. We show that the propagation velocity of the kink can be adiabatically tuned through slow expansions and/or contractions, while its width is given as a function of the velocity. We also analyze the case of fast expansions and/or contractions, where we are no longer on the adiabatic regime. In this case the kink moves more slowly after an expansion-contraction cycle as a consequence of the loss of energy through radiation. All these effects are numerically studied in the nonlinear Klein-Gordon equations (both for the sine-Gordon and for the 𝜙4 potential), and they are also studied within the framework of the collective coordinate evolution equations for the width and the center of mass of the kink. These collective coordinate evolution equations are obtained with a procedure that allows us to consider even the case of large expansions and/or contractions. Cao, F. J., Zamora-Sillero, E., & Quintero, N. R. (2006). Domain wall dynamics in expanding spaces. Physical Review E, 73(5), 056603. 2470-0045 10.1103/PhysRevE.73.056603 https://hdl.handle.net/20.500.14352/104681 2470-0053 https://doi.org/10.1103/PhysRevE.73.056603 https://journals.aps.org/pre/abstract/10.1103/PhysRevE.73.056603 Domain wall dynamics in expanding spaces