60 citations · 89 across the 3 of their papers we have counts for
5 papers
Mott transition in lattice boson models
Roberto Fernandez, Juerg Froehlich, Daniel Ueltschi
We use mathematically rigorous perturbation theory to study the transition between the Mott insulator and the conjectured Bose-Einstein condensate in a hard-core Bose-Hubbard model…
Mean-Field Limit of Quantum Bose Gases and Nonlinear Hartree Equation
Juerg Froehlich, Enno Lenzmann
We discuss the Hartree equation arising in the mean-field limit of large systems of bosons and explain its importance within the class of nonlinear Schroedinger equations. Of speci…
Hund's rule and metallic ferromagnetism
Juerg Froehlich, Daniel Ueltschi
We study tight-binding models of itinerant electrons in two different bands, with effective on-site interactions expressing Coulomb repulsion and Hund's rule. We prove that, for su…
Axions, Quantum Mechanical Pumping, and Primeval Magnetic Fields
J. Froehlich, B. Pedrini
We discuss the ordinary quantum Hall effect and a higher-dimensional cousin. We consider the dimensional reduction of these effects to 1+1 and 3+1 space-time dimensions, respective…
Bosonization of Fermi Liquids
Juerg Froehlich, Roland Goetschmann
We consider systems of non-relativistic, interacting electrons at finite density and zero temperature in d = 2, 3, ... dimensions. Our main concern is to characterize those systems…