Phys. Rev. Lett. 95, 170404 (2005) [4 pages]

Parametric Amplification of Matter Waves in Periodically Translated Optical Lattices

Abstract

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N. Gemelke¹, E. Sarajlic¹, Y. Bidel¹, S. Hong¹, and S. Chu^1,2
¹Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
²Directorate, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Received 28 April 2005; published 19 October 2005

We observe the sudden growth of small classes of Bloch waves from atomic Bose-Einstein condensates held in periodically translated optical lattices. The effect is explained by narrowband parametric amplification of Bloch waves from noise, due to phase-matched scattering of atom pairs out of the condensate. Amplification occurs above a well-defined modulation threshold, described by dynamic shaping of single-particle band structure.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.95.170404

DOI:

10.1103/PhysRevLett.95.170404

PACS:

03.75.Lm, 03.67.−a, 03.75.Be, 03.75.Kk

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Phys. Rev. Lett. 95, 170404 (2005) [4 pages]

Parametric Amplification of Matter Waves in Periodically Translated Optical Lattices