Ultracold dense gas of deeply bound heteronuclear molecules

Simple item page
dc.creatorOspelkaus, S.
dc.creatorPe'er, A.
dc.creatorNi, K. -K.
dc.creatorZirbel, J. J.
dc.creatorNeyenhuis, B.
dc.creatorKotochigova, S.
dc.creatorJulienne, P. S.
dc.creatorYe, J.
dc.creatorJin, D. S.
dc.date2008-02-08
dc.date.accessioned2026-07-07T12:05:39Z
dc.date.available2026-07-07T12:05:39Z
dc.descriptionRecently, the quest for an ultracold and dense ensemble of polar molecules has attracted strong interest. Polar molecules have bright prospects for novel quantum gases with long-range and anisotropic interactions, for quantum information science, and for precision measurements. However, high-density clouds of ultracold polar molecules have so far not been produced. Here, we report a key step towards this goal. Starting from an ultracold dense gas of heteronuclear 40K-87Rb Feshbach molecules with typical binding energies of a few hundred kHz and a negligible dipole moment, we coherently transfer these molecules into a vibrational level of the ground-state molecular potential bound by >10 GHz. We thereby increase the binding energy and the expected dipole moment of the 40K-87Rb molecules by more than four orders of magnitude in a single transfer step. Starting with a single initial state prepared with Feshbach association, we achieve a transfer efficiency of 84%. While dipolar effects are not yet observable, the presented technique can be extended to access much more deeply bound vibrational levels and ultimately those exhibiting a significant dipole moment. The preparation of an ultracold quantum gas of polar molecules might therefore come within experimental reach.
dc.description5 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0802.1093
dc.identifierhttp://arxiv.org/abs/0802.1093
dc.identifierNature Physics, 4, 622 - 626 (2008)
dc.identifierdoi:10.1038/nphys997
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/208433
dc.subjectAtomic Physics
dc.subjectOther Condensed Matter
dc.titleUltracold dense gas of deeply bound heteronuclear molecules
dc.typetext

Files

Collections

arXiv