Anharmonicity Induced Resonances for Ultracold Atoms and their Detection

Abstract

When two atoms interact in the presence of an anharmonic potential, such as an optical lattice, the center of mass motion cannot be separated from the relative motion. In addition to generating a confinement-induced resonance (or shifting the position of an existing Feshbach resonance), the external potential changes the resonance picture qualitatively by introducing new resonances where molecular excited center of mass states cross the scattering threshold. We demonstrate the existence of these resonances, give their quantitative characterization in an optical superlattice, and propose an experimental scheme to detect them through controlled sweeping of the magnetic field.

6 pages, 5 figures; expanded presentation

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• Direct Observation of Second Order Atom Tunnelling
• Controlled exchange interaction between pairs of neutral atoms in an optical lattice
• Molecules of Fermionic Atoms in an Optical Lattice
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• Heteronuclear molecules in an optical lattice: Theory and experiment
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• General Hubbard model for strongly interacting fermions in an optical lattice and its phase detection
• Exact theoretical description of two ultracold atoms in a single site of a 3D optical lattice using realistic interatomic interaction potentials
• Controlled collisions of two ultracold atoms in separate harmonic traps
• Multiscale quantum-defect theory for two interacting atoms in a symmetric harmonic trap
• Test of Particle-Assisted Tunneling for Strongly Interacting Fermions in an Optical Superlattice

Cited by in corpus (17)

• Coherent molecule formation in anharmonic potentials near confinement-induced resonances
• Formation of ultracold molecules by merging optical tweezers
• Inelastic Confinement-Induced Resonances in Low-Dimensional Quantum Systems
• Confinement induced resonances in anharmonic waveguides
• Multichannel Effects near Confinement-Induced Resonances in Harmonic Waveguides
• Theory of inelastic confinement-induced resonances due to the coupling of center-of-mass and relative motion
• Lattice Induced Resonances in One Dimensional Bosonic Systems
• Observation of trap-assisted formation of atom-ion bound states
• Nagaoka ferromagnetism in doped Hubbard models in optical lattices
• Observation of confinement-induced resonances in a 3D lattice
• Atom Pairing in Optical Superlattices
• Feshbach resonances in a nonseparable trap
• Spin dynamics dominated by superexchange via virtual molecules
• Photon-assisted confinement-induced resonances for ultracold atoms
• Quench dynamics of two interacting atoms in a one-dimensional anharmonic trap
• Fast quantum gate via Feshbach-Pauli blocking in a nanoplasmonic trap
• Multi-Channel Computations in Low-Dimensional Few-Body Physics