Collisional stability of a three-component degenerate Fermi gas

Abstract

We report on the creation of a degenerate Fermi gas consisting of a balanced mixture of atoms in three different hyperfine states of ${}^6$Li. This new system consists of three distinguishable Fermions with different and tunable interparticle scattering lengths $a_{12}$, $a_{13}$ and $a_{23}$. We are able to prepare samples containing $5\cdot 10^4$ atoms in each state at a temperature of about $215$nK, which corresponds to $T/T_F\approx 0.37$. We investigated the collisional stability of the gas for magnetic fields between 0 and 600 G and found a prominent loss feature at 130 G. From lifetime measurements we determined three-body loss coefficients, which vary over nearly three orders of magnitude.

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• Observation of resonance condensation of fermionic atom pairs
• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Evidence for Efimov quantum states in an ultracold gas of cesium atoms
• Observation of Bose-Einstein Condensation of Molecules
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Creation of ultracold molecules from a Fermi gas of atoms
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• Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• High-temperature superfluidity of fermionic atoms in optical lattices
• Strongly enhanced inelastic collisions in a Bose-Einstein condensate near Feshbach resonances
• Precise determination of ${}^6$Li cold collision parameters by radio-frequency spectroscopy on weakly bound molecules
• All-Optical Production of a Degenerate Fermi Gas
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Color Superfluidity and "Baryon" Formation in Ultracold Fermions
• Determination of the Fermion Pair Size in a Resonantly Interacting Superfluid
• Superfluidity and magnetism in multicomponent ultracold fermions
• Formation Time of a Fermion Pair Condensate
• BCS pairing in Fermi systems with several flavors
• Trionic phase of ultracold fermions in an optical lattice: A variational study
• Pairing in a three component Fermi gas
• Superfluidity in Three-species Mixture of Fermi Gases across Feshbach Resonances
• Co-existence and shell structures of several superfluids in trapped three-component Fermi mixtures
• Stability of Inhomogeneous Multi-Component Fermi Gases

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