Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session K04: Atom-Atom and Atom-Molecule Collisions
10:30 AM–12:30 PM,
Wednesday, June 2, 2021
Chair: Gil Alexandrowicz, Swansea Univ.
Abstract: K04.00003 : Bootstrapping quantum universality: cross-species calibration of a cold atom pressure sensor*
10:54 AM–11:06 AM
Live
Presenter:
Erik B Frieling
(University of British Columbia)
Author:
Erik B Frieling
(University of British Columbia)
Here we directly compare the self-calibrating method for 87Rb-H2 collisions with calculations of the 6Li+H2 cross section. The 87Rb-H2 trap loss rate was used to determine the H2 background pressure and, subsequently, to determine the <σtotv>coefficient for 6Li-H2 collisions in a dual species magnetic trap. This cross-calibration is necessary because Ud for 6Li-H2 collisions is large, limiting the precision to which <σtotv>can be determined via loss rate dependence . We compare our results to ab-initio calculations performed at NIST [PRA 99, 042704 (2019)], providing further evidence of the applicability of the self-calibrating technique.
*We acknowledge financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC/CRSNG) and the Canadian Foundation for Innovation (CFI).
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