Path Integral Variational Methods for Strongly Correlated Systems

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dc.creatorWalhout, T. S.
dc.creatorCenni, R.
dc.creatorFabrocini, A.
dc.creatorFantoni, S.
dc.date1996-05-08
dc.date.accessioned2026-07-07T11:15:45Z
dc.date.available2026-07-07T11:15:45Z
dc.descriptionWe introduce a new approach to highly correlated systems which generalizes the Fermi Hypernetted Chain and Correlated Basis Function techniques. While the latter approaches can only be applied to systems for which a nonrelativistic wave function can be defined, the new approach is based on the variation of a trial hamiltonian within a path integral framework and thus can also be applied to relativistic and field theoretical problems. We derive a diagrammatic scheme for the new approach and show how a particular choice of the trial hamiltonian corresponds exactly to the use of a Jastrow correlated ansatz for the wave function in the Fermi Hypernetted Chain approach. We show how our new approach can be used to find upper bounds to ground state energies in systems which the FHNC cannot handle, including those described by an energy-dependent effective hamiltonian. We demonstrate our approach by applying it to a quantum field theoretical system of interacting pions and nucleons.
dc.description35 RevTeX pages, 7 separated ps figures available on request
dc.identifierhttps://arxiv.org/abs/nucl-th/9605009
dc.identifierhttp://arxiv.org/abs/nucl-th/9605009
dc.identifierPhys.Rev.C54:1622-1635,1996
dc.identifierdoi:10.1103/PhysRevC.54.1622
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192487
dc.subjectNuclear Theory
dc.titlePath Integral Variational Methods for Strongly Correlated Systems
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