Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653635 | Solid State Communications | 2005 | 6 Pages |
Abstract
Pumping of charge (Q) in a closed ring geometry is not quantized even in the strict adiabatic limit. The deviation form exact quantization can be related to the Thouless conductance. We use the Kubo formalism as a starting point for the calculation of both the dissipative and the adiabatic contributions to Q. As an application we bring examples for classical dissipative pumping, classical adiabatic pumping, and in particular we make an explicit calculation for quantum pumping in case of the simplest pumping device, which is a three site lattice model. We make a connection with the popular S-matrix formalism which has been used to calculate pumping in open systems.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Doron Cohen,