All-Optical Production of a Degenerate Fermi Gas

2001/11/30 by S. R. Granade, Michael E. Gehm, M. E. Gehm +3 · 2 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Atomic physics #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensation #Condensed matter physics #Degeneracy (biology) #Degenerate energy levels #Fermi Gamma-ray Space Telescope #Fermi gas #Hyperfine structure #Nuclear physics #Pairing #Physics #Quantum mechanics #Superconductivity #Trap (plumbing) #cond-mat.soft #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.88.120405

4 pgs RevTeX with 2 eps figs, to be published in Phys. Rev. Lett

arxiv created 2002/03/01 · openalex publication_date 2002/03/08 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We achieve degeneracy in a mixture of the two lowest hyperfine states of 6Li by direct evaporation in a CO2 laser trap, yielding the first all optically produced degenerate Fermi gas. More than 10(5) atoms are confined at temperatures below 4 microK at full trap depth, where the Fermi temperature for each state is 8 microK. This degenerate two-component mixture is ideal for exploring mechanisms of superconductivity ranging from Cooper pairing to Bose-Einstein condensation of strongly bound pairs.

Citations

• Stable, Strongly Attractive, Two-State Mixture of Lithium Fermions in an Optical Trap
• Superfluidity of Spin-Polarized6Li
• Prospect of creating a composite Fermi–Bose superfluid
• UltrastableCO2Laser Trapping of Lithium Fermions
• Observation of Fermi Pressure in a Gas of Trapped Atoms
• Resonance Superfluidity in a Quantum Degenerate Fermi Gas

Cited by

• Cooling Dynamics of Ultracold Two-Species Fermi-Bose Mixtures
• A Bose–Einstein condensate immersed in a Fermi sea: observation of ultra-cold mixture of Bose and Fermi gases
• Tuningp-Wave Interactions in an Ultracold Fermi Gas of Atoms