2005/02/10 by A. M Dudarev, Artem M. Dudarev, M. Marder +7
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum chaos and dynamical systems #physics.atom-ph #stochastic dynamics and bifurcation
paper · pdf · doi:10.1209/epl/i2005-10051-1
7 pages, 3 figures
arxiv created 2005/02/10 · openalex publication_date 2005/05/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We describe the statistical mechanics of a new method to produce very cold atoms or molecules. The method results from trapping a gas in a potential well, and sweeping through the well a semi-permeable barrier, one that allows particles to leave but not to return. If the sweep is sufficiently slow, all the particles trapped in the well compress into a very cold gas. We derive analytical expressions for the velocity distribution of particles in the cold gas, compare these results with numerical simulations, and discuss limitations on reduction in energy due to imperfections of the barrier.