title: Phase-coherent amplification of matter waves
abstract: Phase-coherent matter-wave amplification was demonstrated using Bose- Einstein-condensed rubidium-87 atoms. A small seed matter wave was created with coherent optical Bragg diffraction. Amplification of this seed matter wave was achieved by using the initial condensate as a gain medium through the superradiance effect. The coherence properties of the amplified matter wave, studied with a matter-wave interferometer, were shown to be locked to those of the initial seed wave. The active matter-wave device demonstrated here has great potential in the fields of atom optics, atom lithography, and precision measurements.
authors.affiliation: Institute of Physics, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan. Department of Physics, Gakushuin University, Mejiro 1-5-1, Toshima-ku, Tokyo 171-8588, Japan. Physics Lab, National Institute of Standards and Technology.
authors.initials: M
authors.lastname: Kozuma
authors.initials: Y
authors.lastname: Suzuki
authors.initials: Y
authors.lastname: Torii
authors.initials: T
authors.lastname: Sugiura
authors.initials: T
authors.lastname: Kuga
authors.initials: EW
authors.lastname: Hagley
authors.initials: L
authors.lastname: Deng