Numerical study of the two dimensional Heisenberg model by Green Function Monte Carlo at fixed number of walkers

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dc.creatorCalandra, M.
dc.creatorSorella, S.
dc.date1998-02-02
dc.date.accessioned2026-07-07T03:09:54Z
dc.date.available2026-07-07T03:09:54Z
dc.descriptionWe describe in detail a simple and efficient Green Function Monte Carlo technique for computing both the ground state energy and the ground state properties by the ``forward walking'' scheme. The simplicity of our reconfiguration process, used to maintain the walker population constant, allows to control any source of systematic error in a rigorous and systematic way. We apply this method to the Heisenberg model and obtain accurate and reliable estimates of the ground state energy, the order parameter and the static spin structure factor S(q) for several momenta. For the latter quantity we also find very good agreement with available experimental data on the La2CuO4 antiferromagnet.
dc.description30 pages, RevTeX + a single file containing all the figures, to appear in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/9802020
dc.identifierhttp://arxiv.org/abs/cond-mat/9802020
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28067
dc.subjectCondensed Matter
dc.titleNumerical study of the two dimensional Heisenberg model by Green Function Monte Carlo at fixed number of walkers
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