Quantum pumping and dissipation in closed systems
Abstract
Current can be pumped through a closed system by changing parameters (or fields) in time. Linear response theory (the Kubo formula) allows one to analyze both the charge transport and the associated dissipation effect. We make a distinction between adiabatic and nonadiabatic regimes, and explain the subtle limit of an infinite system. As an example we discuss the following question: What is the amount of charge which is pushed by a moving scatterer? In the lowfrequency (DC) limit we can write dQ=G dX, where dX is the displacement of the scatterer. Thus the issue is to calculate the generalized conductance G.
 Publication:

Physica E LowDimensional Systems and Nanostructures
 Pub Date:
 October 2005
 DOI:
 10.1016/j.physe.2005.05.028
 arXiv:
 arXiv:condmat/0510318
 Bibcode:
 2005PhyE...29..308C
 Keywords:

 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 12 pages, 6 figures, Lecture notes for the proceedings of the conference "Frontiers of Quantum and Mesoscopic Thermodynamics" [Prague, July 2004]