Magnetic field control of elastic scattering in a cold gas of fermionic lithium atoms

Abstract

We study elastic collisions in an optically trapped spin mixture of fermionic lithium atoms in the presence of magnetic fields up to 1.5kG by measuring evaporative loss. Our experiments confirm the expected magnetic tunability of the scattering length by showing the main features of elastic scattering according to recent calculations. We measure the zero crossing of the scattering length that is associated with a predicted Feshbach resonance at 530(3)G. Beyond the resonance we observe the expected large cross section in the triplet scattering regime.

References in corpus (13)

• Formation and Propagation of Matter Wave Soliton Trains
• Formation of a Matter-Wave Bright Soliton
• Stable 85Rb Bose-Einstein Condensates with Widely Tunable Interactions
• Atom--Molecule Coherence in a Bose-Einstein Condensate
• Resonance superfluidity in a quantum degenerate Fermi gas
• Prospect of creating a composite fermi/bose superfluid
• Superfluidity of spin-polarized 6Li
• All-Optical Production of a Degenerate Fermi Gas
• Resonant control of elastic collisions in an optically trapped Fermi gas of atoms
• Resonance Superfluidity: Renormalization of Resonance Scattering Theory
• Elastic and inelastic collisions of 6Li in magnetic and optical traps
• Signatures of resonance superfluidity in a quantum Fermi gas
• Resonator-Enhanced Optical Dipole Trap for Fermionic Lithium Atoms

Cited by in corpus (50)

• Feshbach Resonances in Ultracold Gases
• Bose-Einstein Condensation of Erbium
• Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
• Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
• Polarons, Dressed Molecules, and Itinerant Ferromagnetism in ultracold Fermi gases
• Tuning p-wave interactions in an ultracold Fermi gas of atoms
• Measurement of interaction energy near a Feshbach resonance in a 6Li Fermi gas
• Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
• Universal Quantum Viscosity in a Unitary Fermi Gas
• Measurement of positive and negative scattering lengths in a Fermi gas of atoms
• Precise determination of ${}^6$Li cold collision parameters by radio-frequency spectroscopy on weakly bound molecules
• Three-body problem in Fermi gases with short-range interparticle interaction
• Observation of molecules produced from a Bose-Einstein condensate
• Multiplet Structure of Feshbach Resonances in non-zero partial waves
• Strongly Correlated Quantum Fluids: Ultracold Quantum Gases, Quantum Chromodynamic Plasmas, and Holographic Duality
• Atom-molecule coherence in Bose gases
• Feshbach resonances in ultracold K(39)
• Itinerant Ferromagnetism in an Ultracold Atom Fermi Gas
• Breakdown of Hydrodynamics in the Radial Breathing Mode of a Strongly-Interacting Fermi Gas
• Mechanical Stability of a Strongly-Interacting Fermi Gas of Atoms
• Defect-Suppressed Atomic Crystals in an Optical Lattice
• Observation of Anomalous Spin Segregation in a Trapped Fermi Gas
• Broad Feshbach resonance in the 6Li-40K mixture
• Gray molasses cooling of ${}^{39}$K to a high phase-space density
• Observation of interspecies Li-Cs Feshbach resonances
• Observation of Feshbach resonances between a single ion and ultracold atoms
• Characterization of elastic scattering near a Feshbach resonance in rubidium 87
• Broad universal Feshbach resonances in the chaotic spectrum of Dysprosium atoms
• Breaking van der Waals molecules with magnetic fields
• Atom-molecule coexistence and collective dynamics near a Feshbach resonance of cold fermions
• Extended molecules and geometric scattering resonances in optical lattices
• Integrable dynamics of coupled Fermi-Bose condensates
• Two-component gap solitons in two- and one-dimensional Bose-Einstein condensates
• Resonantly Interacting Fermi-Fermi Mixture of ${}^{161}$Dy and ${}^{40}$K
• Atom Loss Maximum in Ultra-cold Fermi Gases
• Unitarity-Limited Elastic Collision Rate in a Harmonically-Trapped Fermi Gas
• Hydrodynamic behavior in expanding thermal clouds of Rb-87
• Methods for Preparing Quantum Gases of Lithium
• Vortex line in a neutral finite-temperature superfluid Fermi gas
• Feshbach spectroscopy of an ultracold ${}^{41}$K-${}^6$Li mixture and ${}^{41}$K atoms
• Low-momentum ring diagrams of neutron matter at and near the unitary limit
• Unitarity potentials and neutron matter at the unitary limit
• Ultracold collisions of Cs in excited hyperfine and Zeeman states
• Finite-range effects in dilute Fermi gases at unitarity
• Phase transitions in the boson-fermion resonance model in one dimension
• The influence of optical molasses in loading a shallow optical trap
• Effects of collisions against thermal impurities in the dynamics of a trapped fermion gas
• On the spin asymmetry of ground states in trapped two-component Fermi gases with repulsive interactions
• Quantitative Probe of Pairing Correlations in a Cold Fermionic Atom Gas
• Random matrix theory analysis of a temperature-related transformation in statistics of Fano-Feshbach resonances in Thulium atoms