title: Controllable vacuum-induced diffraction of matter-wave superradiance using an all-optical dispersive cavity.
abstract: Cavity quantum electrodynamics (CQED) has played a central role in demonstrating the fundamental principles of the quantum world, and in particular those of atom-light interactions. Developing fast, dynamical and non-mechanical control over a CQED system is particularly desirable for controlling atomic dynamics and building future quantum networks at high speed. However conventional mirrors do not allow for such flexible and fast controls over their coupling to intracavity atoms mediated by photons. Here we theoretically investigate a novel all-optical CQED system composed of a binary Bose-Einstein condensate (BEC) sandwiched by two atomic ensembles. The highly tunable atomic dispersion of the CQED system enables the medium to act as a versatile, all-optically controlled atomic mirror that can be employed to manipulate the vacuum-induced diffraction of matter-wave superradiance. Our study illustrates a innovative all-optical element of atomtroics and sheds new light on controlling light-matter interactions.
authors.affiliation: Department of Physics and Graduate Institute of Photonics, National Changhua University of Education, Changhua 50058, Taiwan.
authors.forename: Shih-Wei
authors.initials: SW
authors.lastname: Su
authors.affiliation: Max Planck Institute for Quantum Optics, D-85748 Garching, Germany.
authors.forename: Zhen-Kai
authors.initials: ZK
authors.lastname: Lu
authors.affiliation: Department of Physics and Graduate Institute of Photonics, National Changhua University of Education, Changhua 50058, Taiwan.
authors.forename: Shih-Chuan
authors.initials: SC
authors.lastname: Gou
authors.affiliation: Department of Physics, National Central University, 32001 Taoyuan City, Taiwan.|Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany.|Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany.|Center for Free-Electron Laser Science, 22761 Hamburg, Germany.
authors.forename: Wen-Te
authors.initials: WT
authors.lastname: Liao