52 citations · 313 across the 14 of their papers we have counts for
4 papers · 1 filter
Solving the Richardson equations for Fermions
Stefan Rombouts, Dimitri Van Neck, Jorge Dukelsky
Forty years ago Richardson showed that the eigenstates of the pairing Hamiltonian with constant interaction strength can be calculated by solving a set of non-linear coupled equati…
Bosons Confined in Optical Lattices: the Numerical Renormalization Group revisited
L. Pollet, S. Rombouts, K. Heyde +1
A Bose-Hubbard model, describing bosons in a harmonic trap with a superimposed optical lattice, is studied using a fast and accurate variational technique (MF+NRG): the Gutzwiller…
The U(5)-O(6) transition in the Interacting Boson Model and the E(5) critical point symmetry
J. M. Arias, C. E. Alonso, A. Vitturi +3
The relation of the recently proposed E(5) critical point symmetry with the interacting boson model is investigated. The large-N limit of the interacting boson model at the critica…
Quantum Phase Transitions in the Interacting Boson Model: Integrability, level repulsion and level crossing
J. M. Arias, J. Dukelsky, J. E. Garcia-Ramos
We study the quantum phase transition mechanisms that arise in the Interacting Boson Model. We show that the second-order nature of the phase transition from U(5) to O(6) may be at…