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Density matrix for a mesoscopic current ribbon

O. Heinonen, M. D. Johnson

cond-matarXiv:cond-mat/9310072

Abstract

We consider an ideal mesoscopic ribbon in which a steady azimuthal current is generated. We show that the closed interacting electron system in the presence of the current is described by a density matrix which is that of an equilibrium system without current but with a constrained Hamiltonian.

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