Dr. Shunsuke Furukawa (Dept. of Physics, Univ. Tokyo)
"Quantum Hall states in rapidly rotating two-component Bose gases"

Under rapid rotation, ultracold gases of bosonic atoms have been predicted to enter a highly correlated regime, which is analogaous to quantum Hall systems. In this talk, I will present our recent study on rapidly rotating two-component (or pseudo-spin-1/2) Bose gases in the quantum Hall regime. These systems offer an ideal setting in which to study the roles of "(pseudo-)spins" in quantum Hall physics. Our main results include (a) the numerical evidence for a non-Abelian spin-singlet state, whose quasiparticles feature non-Abelian statistics, and (b) a phase transtion between different quantum Hall states that occurs as the ratio of the intercomponent to intracomponent interactions changes.
Reference: S.F. and M. Ueda, Phys. Rev. A 86, 031604(R) (2012)