Two-electron correlated motion due to Coulomb repulsion

2002/03/26 by S. A. Gurvitz, Gurvitz, S. A.
Physics and Astronomy · #Chaotic Dynamics (nlin.CD) #Condensed Matter (cond-mat) #FOS: Physical sciences #Quantum Physics (quant-ph) #cond-mat #nlin.CD #quant-ph

paper · pdf · doi:10.48550/arxiv.cond-mat/0203545

4 pages

arxiv created 2002/03/26 · arxiv updated 2009/11/30

Abstract

A Hubbard-type model is derived from the microscopic Schrödinger equation. We found that additional terms describing direct two-electron transitions must be added to the standard Hubbard Hamiltonian. Such a Hamiltonian generates two-electron pairing due to on-site Coulomb repulsion. We demonstrate that the electron pairs with opposite spin propagate across periodic structures via direct and sequential two-electron tunneling. This mechanism can be used for a generation of entangled electron current. Numerical calculations show stability of the electron pairs.

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