Phase-coherent amplification of matter waves.

上妻 幹男, Mikio Kozuma

S. Inouye, Tilman Pfau, Subhadeep Gupta +4 more

S. Inouye, Pfau, Subhadeep Gupta +4 more

Mikio Kozuma, Yoichi Suzuki, Yoshio Torii +4 more

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.

Yuping Huang, Michael Moore

S. Inouye, Tilman Pfau, Subhadeep Gupta +4 more

Summary form only given. Atomic matter waves, just like electromagnetic waves, can be focused, reflected, guided and split by the passive atom optical elements of today. However, the key for many applications of RF and light waves lies in the availability of amplifiers. Here, we report the observation of phase coherent amplification of atomic matter waves.