J. Phys. IV France 116 (2004) 241-245
DOI: 10.1051/jp4:2004116012

Crossover to 2D in a double-evanescent wave trap

D. Rychtarik, B. Engeser, M. Hammes, H.-C. Nägerl and R. Grimm

Institut für Experimentalphysik, Innsbruck University, 6020 Innsbruck, Austria

Abstract
We report the preparation of a dense gas of cesium atoms at the crossover to two-dimensionality in a highly anisotropic surface trap that is realized with two evanescent light waves. Temperatures as low as 100 nK are reached with 20.000 atoms at a phase-space density close to 0.1. The lowest quantum state in the tightly confined direction is populated by more than 60%. The system offers intriguing prospects for future experiments on degenerate quantum gases in two dimensions.

© EDP Sciences 2004

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