Feshbach Spectroscopy of a Shape Resonance

Abstract

We present a new spectroscopy technique for studying cold-collision properties. The technique is based on the association and dissociation of ultracold molecules using a magnetically tunable Feshbach resonance. The energy and lifetime of a shape resonance are determined from a measurement of the dissociation rate. Additional spectroscopic information is obtained from the observation of a spatial interference pattern between an outgoing s wave and d wave. The experimental data agree well with the results from a new model, in which the dissociation process is connected to a scattering gedanken experiment, which is analyzed using a coupled-channels calculation.

Introduction rewritten

References in corpus (5)

• Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
• Feshbach resonances in rubidium 87: Precision measurement and analysis
• Observation of molecules produced from a Bose-Einstein condensate
• Imaging of s and d partial-wave interference in quantum scattering of identical bosonic atoms
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Cited by in corpus (12)

• Association of molecules using a resonantly modulated magnetic field
• Metastable Feshbach Molecules in High Rotational States
• Dissociation of Feshbach Molecules into Different Partial Waves
• Multiple scattering dynamics of fermions at an isolated p-wave resonance
• Mapping partial wave dynamics in scattering resonances by rotational de-excitation collisions
• Quantum Scattering of Distinguishable Bosons using an Ultracold Atom Collider
• Experimental observation of the avoided crossing of two $S$-matrix resonance poles in an ultracold atom collider
• Classification of zero-energy resonances by dissociation of Feshbach molecules
• Atomic Clock Measurements of Quantum Scattering Phase Shifts Spanning Feshbach Resonances at Ultralow Fields
• Feshbach molecule formation through an oscillating magnetic field: subharmonic resonances
• Temperature dependence of $p$-wave contacts in a harmonically trapped Fermi gas
• Observing S-Matrix Pole Flow in Resonance Interplay: Cold Collisions of Ultracold Atoms in a Miniature Laser-based Accelerator