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cond-mat.quant-gas2016★ 10 cited
Wannier functions using a discrete variable representation for optical lattices
Saurabh Paul, Eite Tiesinga
We propose a numerical method using the discrete variable representation (DVR) for constructing real-valued Wannier functions localized in a unit cell for both symmetric and asymme…
cond-mat.quant-gas2016
A Hubbard model for ultracold bosonic atoms interacting via zero-point-energy induced three-body interactions
Saurabh Paul, P. R. Johnson, Eite Tiesinga
We show that for ultra-cold neutral bosonic atoms held in a three-dimensional periodic potential or optical lattice, a Hubbard model with dominant, attractive three-body interactio…
cond-mat.quant-gas2015
Large effective three-body interaction in a double-well optical lattice
Saurabh Paul, Eite Tiesinga
We study ultracold atoms in an optical lattice with two local minima per unit cell and show that the low energy states of a multi-band Bose-Hubbard (BH) Hamiltonian with only pair-…