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5 papers · 2 filters
Effect of spatial inhomogeneity on the mapping between strongly interacting fermions and weakly interacting spins
Vivian V. França, Klaus Capelle
A combined analytical and numerical study is performed of the mapping between strongly interacting fermions and weakly interacting spins, in the framework of the Hubbard, t-J and H…
Feasibility of approximating spatial and local entanglement in long-range interacting systems using the extended Hubbard model
J. P. Coe, V. V. França, I. D'Amico
We investigate the extended Hubbard model as an approximation to the local and spatial entanglement of a one-dimensional chain of nanostructures where the particles interact via a…
Anderson impurity model in nonequilibrium: analytical results versus quantum Monte Carlo data
L. Muehlbacher, D. F. Urban, A. Komnik
We analyze the spectral function of the single-impurity two-terminal Anderson model at finite voltage using the recently developed diagrammatic quantum Monte Carlo technique as wel…
The Hubbard model as an approximation to the entanglement in nanostructures
J. P. Coe, V. V. França, I. D'Amico
We investigate how well the one-dimensional Hubbard model describes the entanglement of particles trapped in a string of quantum wells. We calculate the average single-site entangl…
Quantized antiferromagnetic spin waves in the molecular Heisenberg ring CsFe
J. Dreiser, O. Waldmann, C. Dobe +7
We report on inelastic neutron scattering (INS) measurements on the molecular spin ring CsFe, in which eight spin-5/2 Fe(III) ions are coupled by nearest-neighbor antiferromagn…