A quasi-Hermitian pseudopotential for higher partial wave scattering

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dc.creatorReichenbach, Iris
dc.creatorSilberfarb, Andrew
dc.creatorStock, Rene
dc.creatorDeutsch, Ivan H.
dc.date2006-05-17
dc.date2006-11-18
dc.date.accessioned2026-07-07T07:15:21Z
dc.date.available2026-07-07T07:15:21Z
dc.descriptionWe formulate a new quasi-Hermitian delta-shell pseudopotential for higher partial wave scattering, and show that any such potential must have an energy-dependent regularization. The quasi-Hermiticity of the Hamiltonian leads to a complete set of biorthogonal wave functions that can be used as a basis to expand and diagonalize other two-body Hamiltonians. We demonstrate this procedure for the case of ultracold atoms in a polarization-gradient optical lattice, interacting pairwise when two atoms are transported together from separated lattice sites. Here the pseudopotential depends explicitly on the trapping potential. Additionally, we calculate the location of trap-induced resonances for higher partial waves, which occur when a molecular eigenstate is shifted to resonance with a trap eigenstate. We verify the accuracy of the pseudopotential approach using a toy model in which a square well acts as the true interaction potential, and see excellent agreement.
dc.description8 pages, 4 figures, accepted by PRA v3: some typos were corrected, published version
dc.identifierhttps://arxiv.org/abs/quant-ph/0605147
dc.identifierhttp://arxiv.org/abs/quant-ph/0605147
dc.identifierPhys. Rev. A 74, 042724 (2006)
dc.identifierdoi:10.1103/PhysRevA.74.042724
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/113227
dc.subjectQuantum Physics
dc.subjectOther Condensed Matter
dc.subjectAtomic Physics
dc.titleA quasi-Hermitian pseudopotential for higher partial wave scattering
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