BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-6847
DTSTART:20220217T160000Z
DTEND:20220217T170000Z
DTSTAMP:20260414T113410Z
LAST-MODIFIED:20220208T150245Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Tuning dipolar interactions between molecules for novel dynami
 cs\, R. G. Herb Condensed Matter Seminar\, Jun-Ru Li\, JILA\, NIST and
  University of Colorado\, Boulder
DESCRIPTION:Ultracold polar molecules possess rich internal structure 
 and support dipolar interactions\, bringing new opportunities for stud
 ying quantum phenomena. Complete control of molecular quantum systems 
 has long been hindered by chemical reactions. In this talk\, I will de
 scribe results emerging from our recent implementation of exquisite co
 ntrol of the molecular interaction processes. By using an electric fie
 ld-induced shielding resonance\, we suppress the two-body reactive los
 s in a three-dimensional gas by a factor of 30 while preserving the st
 rong dipolar elastic collisions. In a quasi-two-dimensional geometry w
 here the molecular motion is constrained\, we demonstrate that such lo
 ss is suppressed by aligning dipoles perpendicular to the plane of mot
 ion and exploiting the repulsive channel of the dipolar interactions. 
 Implementing these techniques brings molecular gases into a new regime
  where elastic collisions dominate\, leading to rapid dipolar thermali
 zation and direct evaporative cooling to quantum degeneracy. A feature
  of the dipolar interaction is its long interaction range. Recently\, 
 we have created a stack of two-dimensional layers of molecules where w
 e can control the states of the molecules in each individual layer. We
  directly observed and controlled interactions between molecules in an
 d between these isolated layers. These research results have brought m
 olecular control to a new regime\, highlighting the promise of ultraco
 ld molecular gases as a new platform for quantum science.
URL:https://www.physics.wisc.edu/events/?id=6847
END:VEVENT
END:VCALENDAR