CONDUCTANCE AND CONDUCTANCE FLUCTUATIONS OF MESOSCOPIC SYSTEMS WITH DIFFERENT SYMMETRIES - A STATISTICAL SCATTERING-THEORY APPROACH

A theoretical model of mesoscopic systems, recently introduced by Iida et al. (IWZ), is extended to the case of systems with spin dependent interactions and systems of broken time reversal invariance. The quantum mechanical time reversal operator is represented by an operator acting in a space of abstract matrix fields. Thereby, the discussion of systems with different time reversal behaviour can be unified almost entirely. We recast the IWZ-model in a new parametrization, which is more closely related to other field theoretic models of mesoscopic systems, than the original one.