Radiation and Relaxation of Oscillons

Understand

We study oscillons, extremely long-lived localized oscillations of a scalar field, with three different potentials: quartic, sine-Gordon model and in a new class of convex potentials.

• We use an absorbing boundary at the end of the lattice to remove emitted radiation.
• The energy and the frequency of an oscillon evolve in time and are well fitted by a constant component and a decaying, radiative part obeying a power law as a function time.
• The power spectra of the emitted radiation show several distinct frequency peaks where oscillons release energy.