Ultracold nonreactive molecules in an optical lattice: connecting chemistry to many-body physics
File(s)
Published version
Author(s)
Doçaj, Andris
Wall, Michael L
Mukherjee, Rick
Hazzard, Kaden RA
Type
Journal Article
Abstract
We derive effective lattice models for ultracold bosonic or fermionic nonreactive molecules (NRMs) in an optical lattice, analogous to the Hubbard model that describes ultracold atoms in a lattice. In stark contrast to the Hubbard model, which is commonly assumed to accurately describe NRMs, we find that the single on-site interaction parameter
U
is replaced by a multichannel interaction, whose properties we elucidate. Because this arises from complex short-range collisional physics, it requires no dipolar interactions and thus occurs even in the absence of an electric field or for homonuclear molecules. We find a crossover between coherent few-channel models and fully incoherent single-channel models as the lattice depth is increased. We show that the effective model parameters can be determined in lattice modulation experiments, which, consequently, measure molecular collision dynamics with a vastly sharper energy resolution than experiments in a free-space ultracold gas.
U
is replaced by a multichannel interaction, whose properties we elucidate. Because this arises from complex short-range collisional physics, it requires no dipolar interactions and thus occurs even in the absence of an electric field or for homonuclear molecules. We find a crossover between coherent few-channel models and fully incoherent single-channel models as the lattice depth is increased. We show that the effective model parameters can be determined in lattice modulation experiments, which, consequently, measure molecular collision dynamics with a vastly sharper energy resolution than experiments in a free-space ultracold gas.
Date Issued
2016-03-30
Date Acceptance
2016-03-01
Citation
Physical Review Letters, 2016, 116 (13), pp.135301-1-135301-7
ISSN
0031-9007
Publisher
American Physical Society (APS)
Start Page
135301-1
End Page
135301-7
Journal / Book Title
Physical Review Letters
Volume
116
Issue
13
Copyright Statement
© 2016 American Physical Society
Identifier
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.135301
Subjects
General Physics
01 Mathematical Sciences
02 Physical Sciences
09 Engineering
Publication Status
Published online
Article Number
135301
Date Publish Online
2016-03-30