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Nature

Phase-coherent amplification of atomic matter waves

S. Inouye, Tilman Pfau, Subhadeep Gupta, A. P. Chikkatur, Axel Görlitz, David E. Pritchard, Wolfgang Ketterle

Published Dec 1, 1999• 208 citations
Publisher
DOI
10.1038/45194

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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.