Theoretical description of two ultracold atoms in a single site of a three-dimensional optical lattice using realistic interatomic interaction potentials

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.013403· OSTI ID:21313281

Grishkevich, Sergey; Saenz, Alejandro ^[1]

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1. AG Moderne Optik, Institut fuer Physik, Humboldt-Universitaet zu Berlin, Hausvogteiplatz 5-7, 10117 Berlin (Germany)

A theoretical approach was developed for an exact numerical description of a pair of ultracold atoms interacting via a central potential, which is trapped in a three-dimensional optical lattice. The coupling of center-of-mass and relative-motion coordinates is explicitly considered using a configuration-interaction (exact-diagonalization) technique. Deviations from the harmonic approximation are discussed for several heteronuclear alkali-metal atom pairs trapped in a single site of an optical lattice. The consequences are discussed for the analysis of a recent experiment [C. Ospelkaus et al., Phys. Rev. Lett. 97, 120402 (2006)] in which radio-frequency association was used to create diatomic molecules from a fermionic and a bosonic atom and to measure their binding energies close to a magnetic Feshbach resonance.

• OSTI ID: 21313281
• Journal Information: Physical Review. A, Vol. 80, Issue 1; Other Information: DOI: 10.1103/PhysRevA.80.013403; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
APPROXIMATIONS
ATOMS
BINDING ENERGY
CENTER-OF-MASS SYSTEM
CENTRAL POTENTIAL
CONFIGURATION INTERACTION
COORDINATES
COUPLING
FERMIONS
INTERACTIONS
MOLECULES
PHOTON-MOLECULE COLLISIONS
POTENTIAL ENERGY
RADIATION PRESSURE
RADIOWAVE RADIATION
RUBIDIUM COMPOUNDS
THREE-DIMENSIONAL CALCULATIONS
TRAPPING