BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:0 UID:UW-Physics-Event-2016 DTSTART:20101105T193000Z DURATION:PT1H0M0S DTSTAMP:20260506T161339Z LAST-MODIFIED:20101102T123753Z LOCATION:5310 Chamberlin SUMMARY:Simultaneous Trapping of Ultracold Gases of Lithium and Ytterb ium\, Special Atomic Physics Seminar\, Vlad Ivanov\, University of Was hington DESCRIPTION:Simultaneous trapping of multiple ultra-cold atomic specie s presents a starting point for a wide range of experiments such probi ng strongly interacting quantum gases\, exploring aspects of superflui dity\, and study induced interspecies scattering resonances. It is als o an important step toward synthesis of stable\, polar molecules\, whi ch may be used to study new dipolar quantum superfluids\, as building blocks in scalable quantum computing schemes\, and as sensitive probes of fundamental physics. We choose lithium (Li) and ytterbium (Yb) ato ms as the two constituent species of our experiment for several reason s. Both Li and Yb possess stable bosonic and fermionic isotopes which have been brought to quantum degeneracy in single species experiments. Li is a one-electron atom and Yb is a two-electron atom\, allowing fo r species selective trapping techniques using external magnetic fields \, as well as magnetic trapping of synthesized\, diatomic LiYb molecu les. A large electric dipole moment in the molecular ground state allo ws for studies of strongly dipolar quantum gases\, and makes LiYb a pr omising candidate for a sensitive electron EDM measurement. We achieve simultaneous magneto-optical traps (MOTs) of lithium and ytterbium. B ecause the two MOTs are optimized at different magnetic field settings \, the species are loaded in optical dipole trap sequentially\; Yb is allowed to fully load\, and is then transferred to a far off-resonant optical dipole trap\, (ODT) before Li is introduced into the system. A fter transferring the Li to the ODT we routinely obtain ~1 million opt ically trapped atoms of each species\, at temperatures of about 100 μ K. We use obtained Li-Yb mixture in ODT for study of its collisional s tability\, furthermore we observe thermalization of the mixture that a llows us to extract collisional cross-section of ultra-cold Li and Yb atoms.
\n URL:https://www.physics.wisc.edu/events/?id=2016 END:VEVENT END:VCALENDAR