title: Role reversal in a Bose-condensed optomechanical system.
abstract: We analyze the optomechanicslike properties of a Bose-Einstein condensate (BEC) trapped inside an optical resonator and driven by both a classical and a quantized light field. We find that this system exhibits the nature of role reversal between the matter-wave field and the quantized light field. As a result, the matter-wave field now plays the role of the quantized light field, and the quantized light field behaves like a movable mirror, in contrast to the familiar situation in BEC-based cavity optomechanics [Brennecke et al., Science 322, 235 (2008); Murch et al., Nature Phys. 4, 561 (2008)]. We demonstrate that this system can lead to the creation of a variety of nonclassical matter-wave fields, in particular, cat states, and discuss several possible protocols to measure their Wigner function.
authors.affiliation: Quantum Institute for Light and Atoms, Department of Physics, East China Normal University, Shanghai, People's Republic of China. wpzhang@phy.ecnu.edu.cn
authors.forename: Keye
authors.initials: K
authors.lastname: Zhang
authors.forename: Pierre
authors.initials: P
authors.lastname: Meystre
authors.forename: Weiping
authors.initials: W
authors.lastname: Zhang