Generation of kink-antikink pairs through the excitation of an oscillon in the φ⁴ model

We examine the oscillon decay in a model with a single scalar field and two asymmetric fundamental states. Specifically, we verify how the evolution of an initially excited oscillon leads to the formation of antikink-kink pairs in the presence of a centered long-lived pulse. In such a context, the magnitude of the original perturbation stands for the most important factor influencing the process. For intermediary values of this magnitude, we find a transitory behavior which suggests that the energy exchange between translational and vibrational modes begins to play an important role in the overall evolution. As the magnitude increases, the centered pulse intermediates an interaction between the inner structures which compose the pairs whose behavior mimics that of a standard antikink-kink collision and therefore reinforces the role played by the energy transfer mechanism. For different values of width, an almost pure antikink-kink pair escapes to the infinity after multiple bounces.