Boson Hubbard model with weakly coupled Fermions

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dc.creatorLutchyn, R. M.
dc.creatorTewari, S.
dc.creatorSarma, S. Das
dc.date2008-06-17
dc.date2008-12-03
dc.date.accessioned2026-07-07T12:09:40Z
dc.date.available2026-07-07T12:09:40Z
dc.descriptionUsing an imaginary-time path integral approach, we develop the perturbation theory suited to the boson Hubbard model, and apply it to calculate the effects of a dilute gas of spin-polarized fermions weakly interacting with the bosons. The full theory captures both the static and the dynamic effects of the fermions on the generic superfluid-insulator phase diagram. We find that, in a homogenous system described by a single-band boson Hubbard Hamiltonian, the intrinsic perturbative effect of the fermions is to generically suppress the insulating lobes and to enhance the superfluid phase.
dc.description4 pages, 1 figure; final version as published in PRB
dc.identifierhttps://arxiv.org/abs/0806.2865
dc.identifierhttp://arxiv.org/abs/0806.2865
dc.identifierPhys. Rev. B 78, 220504(R) (2008)
dc.identifierdoi:10.1103/PhysRevB.78.220504
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209702
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.subjectQuantum Physics
dc.titleBoson Hubbard model with weakly coupled Fermions
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