199 citations · 1k across the 13 of their papers we have counts for
3 papers · 1 filter
Spatial correlations of trapped 1d bosons in an optical lattice
C. Kollath, U. Schollwöck, J. von Delft +1
We investigate a quasi-one dimensional system of trapped cold bosonic atoms in an optical lattice by using the density matrix renormalization group to study the Bose-Hubbard model…
Variational ansatz for the superfluid Mott-insulator transition in optical lattices
J. J. Garcia-Ripoll, J. I. Cirac, P. Zoller +3
We develop a variational wave function for the ground state of a one-dimensional bosonic lattice gas. The variational theory is initally developed for the quantum rotor model and l…
Josephson effect between superconducting nanograins with discrete energy levels
Dominique Gobert, Ulrich Schollwock, Jan von Delft
We investigate the Josephson effect between two coupled superconductors, coupled by the tunneling of pairs of electrons, in the regime that their energy level spacing is comparable…