Twist-averaged Boundary Conditions in Continuum Quantum Monte Carlo

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dc.creatorLin, C.
dc.creatorZong, F. -H.
dc.creatorCeperley, D. M.
dc.date2001-01-22
dc.date.accessioned2026-07-07T12:38:18Z
dc.date.available2026-07-07T12:38:18Z
dc.descriptionWe develop and test Quantum Monte Carlo algorithms which use a``twist'' or a phase in the wave function for fermions in periodic boundary conditions. For metallic systems, averaging over the twist results in faster convergence to the thermodynamic limit than periodic boundary conditions for properties involving the kinetic energy with the same computational complexity. We determine exponents for the rate of convergence to the thermodynamic limit for the components of the energy of coulomb systems. We show results with twist averaged variational Monte Carlo on free particles, the Stoner model and the electron gas using Hartree-Fock, Slater-Jastrow, three-body and backflow wavefunction. We also discuss the use of twist averaging in the grand canonical ensemble, and numerical methods to accomplish the twist averaging.
dc.description8 figures, 12 pages
dc.identifierhttps://arxiv.org/abs/cond-mat/0101339
dc.identifierhttp://arxiv.org/abs/cond-mat/0101339
dc.identifierPhys.Rev.E64:016702,2001
dc.identifierdoi:10.1103/PhysRevE.64.016702
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218710
dc.subjectStatistical Mechanics
dc.titleTwist-averaged Boundary Conditions in Continuum Quantum Monte Carlo
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