Resonant formation of strongly correlated paired states in rotating Bose gases

Abstract

We propose increasing the fractional quantum Hall gap of a rapidly rotating Bose gas by increasing the interatomic interactions via a Feshbach resonance. The generation of molecules by the resonance causes pair correlations to grow throughout the system effecting the ground state. By an extension of the usual Chern-Simons theory, built of composite atoms and molecules, we are able to account for these resonance effects. We find that the resulting ground state evolves from a Laughlin wavefunction to a unique paired wavefunction as one approaches the resonance.