Abstract
Ultracold atomic gas experiments have proven to be a versatile ground
for studying quantum mechanics, quantum many-body physics, quantum
simulation and computation. A precise model for two-body collisions in
those systems is essential. Coupled-channels models can accurately
describe the two-atom system at ultracold temperatures by detailed
interaction potentials that are finetuned by just a few parameters,
determined from experiment. We extend such a coupled-channels model to
include the situation in a Mott insulator phase of ultracold bosonic
atoms, where two atoms are confined to one lattice site. Of particular
importance is the specific conversion between the on-site interaction
energy, which remains finite in the lattice, and the scattering length
around a Feshbach resonance that diverges. Recently spectroscopic
techniques allowed for a precise experimental determination of the
on-site interaction energy in a system of 7Li atoms, we
analyze this data with our model to improve the precision of current
lithium interaction potentials.
| Original language | English |
|---|---|
| Article number | e01.00023 |
| Number of pages | 1 |
| Journal | Bulletin of the American Physical Society |
| Volume | 64 |
| Issue number | 4 |
| Publication status | Published - 1 May 2019 |
| Event | 50th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics, DAMOP 2019 - Milwaukee, United States Duration: 27 May 2019 → 31 May 2019 Conference number: 50 |