Hartree-Fock Based Diagonalization: An Efficient Method for Simulating Disordered Interacting Electrons
We present an efficient numerical method for simulating the low-energy properties of disordered many-particle systems. The method which is based on the quantum-chemical configuration interaction approach consists in diagonalizing the Hamiltonian in an energetically truncated basis build of the low-energy states of the corresponding Hartree-Fock Hamiltonian. As an example we investigate the quantum Coulomb glass, a model of spineless electrons in a random potential interacting via the long-range Coulomb interaction. We find that the Coulomb interaction increases the conductance of strongly disordered systems but reduces the conductance of weakly disordered systems.
T. Vojta et al., "Hartree-Fock Based Diagonalization: An Efficient Method for Simulating Disordered Interacting Electrons," Computer Physics Communications, vol. 121, pp. 489-492, Elsevier, Sep 1999.
The definitive version is available at http://dx.doi.org/10.1016/S0010-4655(99)00388-4
1998 Europhysics Conference on Computational Physics (1998: Sep. 2-5, Granada, Spain)
Keywords and Phrases
Computer simulation; Electric conductance; Numerical methods; Quantum theory; Random processes; Disordered many-particle systems; Hartree-Fock based diagonalization; Quantum Coulomb glass; Electron energy levels
International Standard Serial Number (ISSN)
Article - Conference proceedings
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