A self-consistent perturbative evaluation of ground state energies: application to cohesive energies of spin lattices

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dc.creatorHajj, Mohamad Al
dc.creatorMalrieu, Jean-Paul
dc.date2004-11-21
dc.date.accessioned2026-07-07T06:24:47Z
dc.date.available2026-07-07T06:24:47Z
dc.descriptionThe work presents a simple formalism which proposes an estimate of the ground state energy from a single reference function. It is based on a perturbative expansion but leads to non linear coupled equations. It can be viewed as well as a modified coupled cluster formulation. Applied to a series of spin lattices governed by model Hamiltonians the method leads to simple analytic solutions. The so-calculated cohesive energies are surprisingly accurate. Two examples illustrate its applicability to locate phase transition.
dc.descriptionAccepted by Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0411542
dc.identifierhttp://arxiv.org/abs/cond-mat/0411542
dc.identifierdoi:10.1103/PhysRevB.70.184441
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96666
dc.subjectStrongly Correlated Electrons
dc.titleA self-consistent perturbative evaluation of ground state energies: application to cohesive energies of spin lattices
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