Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-08-12
Phys. Rev. A 81, 011605(R) (2010)
Physics
Condensed Matter
Quantum Gases
(5 pages, 3 pages, submitted to Phys. Rev. Lett.)
Scientific paper
10.1103/PhysRevA.81.011605
Ultracold ground state dipolar 40K-87Rb molecules have recently been produced in a loose harmonic trap by employing a magnetic field sweep across a Feshbach resonance followed by stimulated Raman adiabatic passage [K.-K. Ni et al., Science 322, 231 (2008)]. The overall experimental efficiency for molecule formation was around 20%. We show that the efficiency can be increased to nearly 100% if one first loads the atomic gases into an optical lattice of the appropriate depth and tunes the interspecies attraction to have exactly one atom of each species at an occupied lattice site. Our proposed scheme provides a large enhancement to the dipolar molecule density even at relatively high temperatures, and avoids three-body recombination loss by preventing lattice sites from being triply occupied.
Freericks James K.
Hanna Thomas M.
Hu Anzi
Julienne Paul S.
Lemanski Romuald
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