Multichannel interactions of two atoms in an optical tweezer

Abstract

The multichannel Na-Cs interactions are characterized by a series of measurements using two atoms in an optical tweezer, along with a multichannel quantum defect theory (MQDT). The triplet and singlet scattering lengths are measured by performing Raman spectroscopy of the Na-Cs motional states and least-bound molecular state in the tweezer. Magnetic Feshbach resonances are observed for only two atoms at fields which agree well with the MQDT. Our methodology, which promotes the idea of an effective theory of interaction, can be a key step towards the understanding and the description of more complex interactions. The tweezer-based measurements in particular will be an important tool for atom-molecule and molecule-molecule interactions, where high densities are experimentally challenging and where the interactions can be dominated by intra-species processes.

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Cited by in corpus (16)

• Observation of Collisions between Two Ultracold Ground-State CaF Molecules
• Forming a single molecule by magnetoassociation in an optical tweezer
• Overlapping Bose-Einstein Condensates of ${}^{23}$Na and ${}^{133}$Cs
• Coherent optical creation of a single molecule
• Preparation of ${}^{87}$Rb and ${}^{133}$Cs in the motional ground state of a single optical tweezer
• Quantum simulation of the central spin model with a Rydberg atom and polar molecules in optical tweezers
• Triatomic Photoassociation in an Ultracold Atom-Molecule Collision
• Interaction potential for NaCs for ultracold scattering and spectroscopy
• Analytical solution for the spectrum of two ultracold atoms in a completely anisotropic confinement
• Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers
• Inelastic collisions in radiofrequency-dressed mixtures of ultracold atoms
• Resonator-assisted single molecule quantum state detection
• Universal energy-dependent pseudopotential for the two-body problem of confined ultracold atoms
• Cold hybrid electrical-optical ion trap
• Probing the interaction energy of two ${}^{85}$Rb atoms in an optical tweezer via spin-motion coupling
• Lellouch-Lüscher relation for ultracold few-atom systems under confinement