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 (12)

• Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
• Creation of ultracold molecules from a Fermi gas of atoms
• Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
• Production of Long-Lived Ultracold Li2 Molecules from a Fermi gas
• 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
• Dissociation and Decay of Ultra-cold Sodium Molecules
• Interferometric determination of the s- and d-wave scattering amplitudes in ${}^{87}$Rb
• Imaging of s and d partial-wave interference in quantum scattering of identical bosonic atoms
• Dissociation of ultracold molecules with Feshbach resonances
• Spontaneous Dissociation of 85Rb Feshbach Molecules

Cited by in corpus (24)

• Feshbach Resonances in Ultracold Gases
• Production of cold molecules via magnetically tunable Feshbach resonances
• Interatomic potentials, electric properties, and spectroscopy of the ground and excited states of the Rb_2 molecule: Ab initio calculations and effect of a non-resonant field
• Photodissociation of ultracold diatomic strontium molecules with quantum state control
• Unconventional strongly interacting Bose-Einstein condensates in optical lattices
• Pseudopotential in resonant regimes
• Association of molecules using a resonantly modulated magnetic field
• Metastable Feshbach Molecules in High Rotational States
• Broad Feshbach resonances in ultracold alkali-metal systems
• Dissociation of Feshbach Molecules into Different Partial Waves
• Manipulating Higher Partial-Wave Atom-Atom Interaction by Strong Photoassoiative Coupling
• Multiple scattering dynamics of fermions at an isolated p-wave resonance
• Mapping partial wave dynamics in scattering resonances by rotational de-excitation collisions
• Observation of bound state self-interaction in a nano-eV atom collider
• Photoassociation to the 2(1)Sigma(g)(+) state in ultracold 85Rb2 in the presence of a shape resonance
• Above threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider
• 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
• Atomic Clock Measurements of Quantum Scattering Phase Shifts Spanning Feshbach Resonances at Ultralow Fields
• Classification of zero-energy resonances by dissociation of Feshbach molecules
• High-precision analysis of Feshbach resonances in a Mott insulator
• 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