Relaxation in glasses at low temperatures

The interaction between tunneling system inherent in amorphous solids is established to be responsible for the univerasl behavior of their kinetics and thermodynamics properties at low temperature. In the paper we describe the relaxation mechanism induced by the intercation which falls down as $R^{-3}$ at large distance. This interaction is either the electrostatic dipole – dipole one or is the elastic one between the point defects (tunneling system). In the last case, the intercation is due to indirect interaction induced by acoustic virtual phonon exchange. The relaxation gets significant at sufficiently low temperature when phonons are substantially frozen out. We show that in the realistic experimental situation the measuring field strongly accelerates the interaction stimulated relaxation. The characteristic temperature and field dependences of the relaxation rate are found when the rate is affected both by the interaction between tunneling systems and by the external field.