2000/05/14 by M. Hammes, D. Rychtarik, В. В. Дружиніна +6 · 1 citation
Computer Science · Physics and Astronomy · #Advanced Frequency and Time Standards #Atom (system on chip) #Atomic physics #Caesium #Cold Atom Physics and Bose-Einstein Condensates #Evaporation #Evaporative cooler #Laser #Laser cooling #Materials science #Nuclear physics #Optics #Phase (matter) #Physics #Quantum Information and Cryptography #Quantum mechanics #Thermodynamics #Trap (plumbing) #Ultracold atom #physics.atom-ph
paper · pdf · doi:10.1080/09500340008232195
published as J. Mod. Opt. 47, 2755 (2000) · 8 pages, 6 figures, submitted to Journal of Modern Optics, special issue "Fundamentals of Quantum Optics V", edited by F. Ehlotzky
arxiv created 2000/05/14 · openalex publication_date 2000/11/01 · arxiv updated 2015/06/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report on cooling of an atomic caesium gas closely above an evanescent-wave atom mirror. At high densities, optical cooling based on inelastic reflections is found to be limited by a density-dependent excess temperature and trap loss due to ultracold collisions involving repulsive molecular states. Nevertheless, very good starting conditions for subsequent evaporative cooling are obtained. Our first evaporation experiments show a temperature reduction from 10 μK down to 300 nK along with a gain in phase-space density of almost two orders of magnitude.