Above threshold scattering about a Feshbach resonance for ultracold atoms in an optical collider
arXiv:1704.07109 · doi:10.1038/s41467-017-00458-y
Abstract
Ultracold atomic gases have realised numerous paradigms of condensed matter physics where control over interactions has crucially been afforded by tunable Feshbach resonances. So far, the characterisation of these Feshbach resonances has almost exclusively relied on experiments in the threshold regime near zero energy. Here we use a laser-based collider to probe a narrow magnetic Feshbach resonance of rubidium above threshold. By measuring the overall atomic loss from colliding clouds as a function of magnetic field, we track the energy-dependent resonance position. At higher energy, our collider scheme broadens the loss feature, making the identification of the narrow resonance challenging. However, we observe that the collisions give rise to shifts in the centre-of-mass positions of outgoing clouds. The shifts cross zero at the resonance and this allows us to accurately determine its location well above threshold. Our inferred resonance positions are in excellent agreement with theory.
arXiv comment8 pages, 6 figures
References in corpus (39)
- Feshbach Resonances in Ultracold Gases
- Observation of resonance condensation of fermionic atom pairs
- Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
- Production of cold molecules via magnetically tunable Feshbach resonances
- Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
- Vortices and Superfluidity in a Strongly Interacting Fermi Gas
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Experimental Study of the BEC-BCS Crossover Region in Lithium 6
- Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
- Formation of bright matter-wave solitons during the collapse of Bose-Einstein condensates
- Molecular Probe of Pairing in the BEC-BCS Crossover
- Tuning p-wave interactions in an ultracold Fermi gas of atoms
- Feshbach resonances in rubidium 87: Precision measurement and analysis
- Dissociation and Decay of Ultra-cold Sodium Molecules
- Hyperfine, rotational, and vibrational structure of the triplet ground state of Rb molecules
- Feshbach resonances in ultracold atomic and molecular collisions: threshold behaviour and suppression of poles in scattering lengths
- Observation of low-field Fano-Feshbach resonances in ultracold gases of dysprosium
- Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas
- Interferometric determination of the s- and d-wave scattering amplitudes in Rb
- Dissociation of ultracold molecules with Feshbach resonances
- Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
- Radio-frequency dressing of multiple Feshbach resonances
- Enhancement of variation of fundamental constants in ultracold atom and molecule systems near Feshbach resonances
- Formation of Ultracold NaRb Feshbach Molecules
- Creation and manipulation of Feshbach resonances with radio-frequency radiation
- Steerable optical tweezers for ultracold atom studies
- Feshbach Spectroscopy of a Shape Resonance
- A Feshbach resonance in d-wave collisions
- Direct Simulation Monte Carlo method for cold atom dynamics: classical Boltzmann equation in the quantum collision regime
- A laser based accelerator for ultracold atoms
- Dissociation of Feshbach Molecules into Different Partial Waves
- Simple Theoretical Models for Resonant Cold Atom Interactions
- Multiple scattering dynamics of fermions at an isolated p-wave resonance
- Anisotropic collisions of dipolar Bose-Einstein condensates in the universal regime
- Sensitivity to alpha-variation in ultracold atomic-scattering experiments
- Dispersive optical detection of magnetic Feshbach resonances in ultracold gases
- Quantum Scattering of Distinguishable Bosons using an Ultracold Atom Collider
- Direct Observation of Resonant Scattering Phase Shifts and their Energy Dependence
- Controlling the group velocity of colliding atomic Bose-Einstein condensates with Feshbach resonances
Cited by in corpus (8)
- Thermally-robust spin correlations between two 85Rb atoms in an optical microtrap
- Observation of bound state self-interaction in a nano-eV atom collider
- A three-dimensional steerable optical tweezer system for ultracold atoms
- Microscopy of an ultranarrow Feshbach resonance using a laser-based atom collider: A quantum defect theory analysis
- Quantum Scattering in an Optical Collider for Ultracold Atoms
- Anomalous loss behavior in a single-component Fermi gas close to a -Wave Feshbach resonance
- Emerging (2+1)D massive graviton in graphene-like systems
- Observing S-Matrix Pole Flow in Resonance Interplay: Cold Collisions of Ultracold Atoms in a Miniature Laser-based Accelerator