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DESCRIPTION:Benjamin Lev\, JILA\n\nThe experimental realization of large sa
mples of ultracold\, ground\nstate polar molecules would be a major breakt
hrough for research in\nultracold collisions and chemistry\, quantum infor
mation processing\,\nand the study of novel states of matter. To accompli
sh this goal\, our\nresearch employs a Stark decelerator to slow a superso
nic expansion of\nOH in its rovibronic ground state. At the decelerator's
terminus\, a 30\nmK OH packet of density 10 4 cm -3 is caught and confined in a\nmagnetic quadrupole trap. An adjustable
electric field of sufficient\nmagnitude to completely polarize the OH is s
uperimposed on the trap in\neither a quadrupole or homogenous field geomet
ry. The trap dynamics\ndeviate from that governed by simple addition of t
he fields' forces on\nOH's magnetic and electric dipoles. Confinement of c
old polar\nmolecules in a magnetic trap\, leaving large\, adjustable elect
ric\nfields for control\, is an important step towards the study of low\ne
nergy dipole-dipole collisions. The cold molecular packets produced\nvia S
tark deceleration have enabled us to perform precision microwave\nspectros
copy of the OH ground state structure\, which serves as an\nimportant syst
em for constraining variation of fundamental constants\nand for molecular
quantum information processing. Future experiments\nwill require much col
der molecules\, and we will briefly discuss\nprospects for cavity-assisted
laser cooling of OH.
DTSTART:20070409T193000Z
LOCATION:Physics Building\, Room 204
SUMMARY:OH Stark deceleration: magnetic trapping\, molecular qubits\, and c
avity-assisted laser cooling
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