Transport and conduction in random systems

摘要: Abstract We discuss the use of effective medium approximation (EMA) for calculation macroscopic properties a microscopically disordered system. This technique has long history static problems, but only recently been applied to time-dependent problems. Our discussion is restricted, simplicity, case periodic lattice with disorder in transport at level individual bonds. review recent applications EMA rate equations (master equations) and show how basic formalism extends class integro-difference (generalized master processes which loss mobile species from system possible. In each properties, obtained by smoothing out spatial disorder, exhibit time-correlation or memory effects.