2014 Using relations between the various energies of a wave and the variation theorem, the authors deduce equations from which the influence of parameters on the dispersion curve can be easily calculated. In the second part, the above results are applied to the axisymmetrical mode (surface wave) which is propagated along a plasma column. In particular, it is shown that the wave damping depends ...

We study the properties of classical and quantum strongly nonlinear chains by means of extensive numerical simulations. Due to strong nonlinearity, the classical dynamics of such chains remains chaotic at arbitrarily low energies. We show that the collective excitations of classical chains are described by sound waves whose decay rate scales algebraically with the wave number with a generic exp...

In sonoluminescence sound waves in the fluid are converted into UV-photons. In this letter we put forward a mechanism based on superradiance that operates this conversion. The predicted energies of emitted light turns out to lie in the range of 1-10 eV, in good agreement with experiment. Furthermore our paradigm hints why the effect hinges so crucially on the cavitation of a noble gas