Observation of Fermi Pressure in a Gas of Trapped Atoms

2001/03/30 by A. G. Truscott, Kevin E. Strecker, W. I. McAlexander +2 · 9 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Physics of Superconductivity and Magnetism

paper · pdf · doi:10.1126/science.1059318

openalex publication_date 2001/03/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23

Abstract

We report the attainment of simultaneous quantum degeneracy in a mixed gas of bosons (lithium-7) and fermions (lithium-6). The Fermi gas has been cooled to a temperature of 0.25 times the Fermi temperature by thermal collisions with the evaporatively cooled bosons. At this temperature, the spatial size of the gas is strongly affected by the Fermi pressure resulting from the Pauli exclusion principle and gives clear experimental evidence for quantum degeneracy.

Citations

• Stable, Strongly Attractive, Two-State Mixture of Lithium Fermions in an Optical Trap
• Superfluidity of Spin-Polarized6Li
• Evidence of Bose-Einstein Condensation in an Atomic Gas with Attractive Interactions
• Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor
• Black Holes, White Dwarfs, and Neutron Stars: The Physics of Compact Objects
• Simultaneous magneto-optical trapping of two lithium isotopes
• Bose-Einstein Condensation in a Gas of Sodium Atoms

Cited by

• Clustering of Fermi Particles with Arbitrary Spin
• Superfluidity of Trapped Dipolar Fermi Gases
• Mean-field theory of Bose–Fermi mixtures in optical lattices
• Phase Conjugation of a Quantum-Degenerate Atomic Fermion Beam
• Paired fermionic superfluids with s- and p-wave interactions
• Feshbach resonances in ultracold gases
• Collective excitation of trapped degenerate Fermi gases
• Bose–Einstein condensate [wikipedia]
• Lithium [wikipedia]