Density Matrix Renormalization Group Lagrangians

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dc.creatorChan, Garnet Kin-Lic
dc.date2008-04-10
dc.date.accessioned2026-07-07T09:31:36Z
dc.date.available2026-07-07T09:31:36Z
dc.descriptionWe introduce a Lagrangian formulation of the Density Matrix Renormalization Group (DMRG). We present Lagrangians which when minimised yield the optimal DMRG wavefunction in a variational sense, both within the general matrix product ansatz, as well as within the canonical form of the matrix product that is constructed within the DMRG sweep algorithm. Some of the results obtained are similar to elementary expressions in Hartree-Fock theory, and we draw attention to such analogies. The Lagrangians introduced here will be useful in developing theories of analytic response and derivatives in the DMRG.
dc.description6 pages
dc.identifierhttps://arxiv.org/abs/0804.1755
dc.identifierhttp://arxiv.org/abs/0804.1755
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/158517
dc.subjectStrongly Correlated Electrons
dc.titleDensity Matrix Renormalization Group Lagrangians
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