Sympathetic Cooling of Lithium by Laser-cooled Cesium
نویسندگان
چکیده
We present first indications of sympathetic cooling between two neutral trapped atomic species. Lithium and cesium atoms are simultaneously stored in an optical dipole trap formed by the focus of a CO2 laser, and allowed to interact for a given period of time. The temperature of the lithium gas is found to decrease when in thermal contact with cold cesium. The timescale of thermalization yields an estimate for the Li-Cs cross-section.
منابع مشابه
Sympathetic cooling with two atomic species in an optical trap.
We simultaneously trap ultracold lithium and cesium atoms in an optical dipole trap formed by the focus of a CO2 laser and study the exchange of thermal energy between the gases. The optically cooled cesium gas efficiently decreases the temperature of the lithium gas through sympathetic cooling. Equilibrium temperatures down to 25 microK have been reached. The measured cross section for thermal...
متن کاملMixture of ultracold lithium and cesium atoms in an optical dipole trap
We present the first simultaneous trapping of two different ultracold atomic species in a conservative trap. Lithium and cesium atoms are stored in an optical dipole trap formed by the focus of a CO2 laser. Techniques for loading both species of atoms are discussed and observations of elastic and inelastic collisions between the two species are presented. A model for sympathetic cooling of two ...
متن کاملTrapping of Molecular Oxygen together with Lithium Atoms.
We demonstrate simultaneous deceleration and trapping of a cold atomic and molecular mixture. This is the first step towards studies of cold atom-molecule collisions at low temperatures as well as application of sympathetic cooling. Both atoms and molecules are cooled in a supersonic expansion and are loaded into a moving magnetic trap that brings them to rest via the Zeeman interaction from an...
متن کاملSympathetic cooling of bosonic and fermionic Lithium gases towards quantum degeneracy
Sympathetic cooling of two atomic isotopes is experimentally investigated. Using forced evaporation of a bosonic 7 Li gas in a magnetic trap, a sample of 3 10 5 6 Li fermions has been sympathetically cooled to 9(3) µK, corresponding to 2.2(0.8) times the Fermi temperature. The measured rate constant for 2-body inelastic collisions of 7 Li |2, 2 state at low magnetic field is 1.0
متن کاملTowards Laser Cooling of Magnesium Ions for Sympathetic cooling of Highly Charged Ions at SPECTRAP
Experiments with highly charged ions (HCI), especially with H-like and Li-like ions are an excellent testing ground for quantum electrodynamics (QED) in strong electric and magnetic fields and for precise measurements of fundamental constants. At the ESR, an experiment is being prepared to search for the hyperfine transition in lithiumlike Bi in order to disentangle nuclear structure from QED e...
متن کامل