PARAMETRICALLY EXCITED INTERNAL WAVE BREATHERS AND KINKS IN LIQUIDS

In parametrically excited Faraday experiment the non-propagating solit ons-breathers, kinks and breather pairs- have been observed at the int erface of two insoluble liquids with different densities. Phenomena ob served at the interface are similar to those on the surface, except th at the eigenfrequencies are remarkably red-shifted, and the wave ferns are flatter and less stable due to the presence of the upper liquid. A nonlinear Schrodinger equation with damping and drive terms has been derived to explain the new observations. Both experiment and theory s how that the free surface wave is a special case of the interface wave .