Conductance Fluctuations in Disordered Wires with Perfectly Conducting Channels

摘要: We study conductance fluctuations in disordered quantum wires with unitary symmetry focusing on the case which number of conducting channels one propagating direction is not equal to that opposite direction. consider $N+m$ left-moving and $N$ right-moving channels. In this case, $m$ become perfectly conducting, dimensionless $g$ for behaves as $g \to m$ long-wire limit. obtain variance diffusive regime by using Dorokhov-Mello-Pereyra-Kumar equation transmission eigenvalues. It shown universality breaks down $m \neq 0$ unless very large.