Alfe, D;
Gillan, MJ;
(2004)
Linear-scaling quantum Monte Carlo technique with non-orthogonal localized orbitals.
J PHYS-CONDENS MAT
, 16
(25)
L305 - L311.
10.1088/0953-8984/16/25/L01.
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Abstract
We have reformulated the quantum Monte Carlo (QMC) technique so that a large part of the calculation scales linearly with the number of atoms. The reformulation is related to a recent alternative proposal for achieving linear-scaling QMC, based on maximally localized Wannier orbitals (MLWO), but has the advantage of greater simplicity. The technique we propose draws on methods recently developed for linear-scaling density functional theory. We report tests of the new technique on the insulator MgO, and show that its linear-scaling performance is somewhat better than that achieved by the MLWO approach. Implications for the application of QMC to large complex systems are pointed out.
| Type: | Article |
|---|---|
| Title: | Linear-scaling quantum Monte Carlo technique with non-orthogonal localized orbitals |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0953-8984/16/25/L01 |
| Keywords: | DENSITY-MATRIX |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/636 |
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