29 citations · 101 across the 4 of their papers we have counts for
4 papers
Two-site Bose-Hubbard model with nonlinear tunneling: classical and quantum analysis
Diefferson Rubeni, Jon Links, Phillip Isaac +1
The extended Bose-Hubbard model for a double-well potential with atom-pair tunneling is studied. Starting with a classical analysis we determine the existence of three different qu…
A geometric wave function for few interacting bosons in a harmonic trap
B. Wilson, A. Foerster, C. C. N. Kuhn +2
We establish a new geometric wave function that combined with a variational principle efficiently describes a system of bosons interacting in a one-dimensional trap. By means of a…
Two interacting fermions in a 1D harmonic trap: matching the Bethe ansatz and variational approaches
D. Rubeni, A. Foerster, I. Roditi
In this work, combining the Bethe ansatz approach with the variational principle, we calculate the ground state energy of the relative motion of a system of two fermions with spin…
Quantum phase transitions in Bose-Einstein condensates from a Bethe ansatz perspective
D. Rubeni, A. Foerster, E. Mattei +1
We investigate two solvable models for Bose-Einstein condensates and extract physical information by studying the structure of the solutions of their Bethe ansatz equations. A care…