Long-Lived Dipolar Molecules and Feshbach Molecules in a 3D Optical Lattice

作者：Chotia Amodsen; Neyenhuis Brian; Moses Steven A; Yan Bo; Covey Jacob P; Foss Feig Michael; Rey Ana Maria; Jin Deborah S^*; Ye Jun

来源：Physical Review Letters, 2012, 108(8): 080405.

DOI：10.1103/PhysRevLett.108.080405

We have realized long-lived ground-state polar molecules in a 3D optical lattice, with a lifetime of up to 25 s, which is limited only by off-resonant scattering of the trapping light. Starting from a 2D optical lattice, we observe that the lifetime increases dramatically as a small lattice potential is added along the tube-shaped lattice traps. The 3D optical lattice also dramatically increases the lifetime for weakly bound Feshbach molecules. For a pure gas of Feshbach molecules, we observe a lifetime of greater than 20 s in a 3D optical lattice; this represents a 100-fold improvement over previous results. This lifetime is also limited by off-resonant scattering, the rate of which is related to the size of the Feshbach molecule. Individually trapped Feshbach molecules in the 3D lattice can be converted to pairs of K and Rb atoms and back with nearly 100% efficiency.

• 出版日期2012-2-23