  The nonequilibrium transfer of the energy between electrons of
counter-propagating quasi-one-dimensional systems has been perturbatively
calculated for edge channels in a two-dimensional system in the integer quantum
Hall effect. The processes involving two electrons that are allowed only in the
system with disorder have been taken into account. Expressions for the cases of
Coulomb scattering and transfer of nonequilibrium phonons have been obtained.
The energy transferred per unit time has a quasi-threshold dependence on the
degree of nonequilibrium of the hot channel. According to numerical estimates
for electrons in GaAs, Coulomb scattering processes dominate in the energy
transfer and the expected effect can be experimentally observed.
