Nondissipative Drag Conductance as a Topological Quantum Number
arXiv:cond-mat/9904061 · doi:10.1103/PhysRevB.63.073301
Abstract
We show in this paper that the boundary condition averaged nondissipative drag conductance of two coupled mesoscopic rings with no tunneling, evaluated in a particular many-particle eigenstate, is a topological invariant characterized by a Chern integer. Physical implications of this observation are discussed.
4 pages, no figure. Title modified and significant revision made to the text. Final version appeared in PRB