1112.3942 (Ping Xiang et al.)

Tunable exciton interactions in optical lattices with polar molecules    [PDF]

Ping Xiang, Marina Litinskaya, Roman V. Krems

Rotational excitation of polar molecules trapped in an optical lattice gives rise to rotational excitons. Here we show that non-linear interactions of such excitons can be controlled by an electric field. The exciton--exciton interactions can be tuned to induce exciton pairing, leading to the formation of biexcitons. Tunable non-linear interactions between excitons can be used for many applications ranging from the controlled preparation of entangled quasiparticles to the study of polaron interactions and the effects of non-linear interactions on quantum energy transport in molecular aggregates.

View original: http://arxiv.org/abs/1112.3942