We investigate the quantum dynamics of repulsively bound atom
pairs in an optical lattice described by the periodic Bose-Hubbard
model both analytically and numerically. In the strongly repulsive
limit, we analytically study the dynamical problem by the
perturbation method with the hopping terms treated as a
perturbation. For a finite-size system, we numerically solve the
dynamic problem in the whole regime of interaction by the exact
diagonalization method. Our results show that the initially
prepared atom pairs are dynamically stable and the dissociation of
atom pairs is greatly suppressed when the strength of the on-site
interaction is much greater than the tunneling amplitude, i.e.,
the strongly repulsive interaction induces a self-localization
phenomenon of the atom pairs
Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.