1D to 3D Crossover of a Spin-Imbalanced Fermi Gas

Abstract

We have characterized the one-dimensional (1D) to three-dimensional (3D) crossover of a two-component spin-imbalanced Fermi gas of 6-lithium atoms in a 2D optical lattice by varying the lattice tunneling and the interactions. The gas phase separates, and we detect the phase boundaries using in situ imaging of the inhomogeneous density profiles. The locations of the phases are inverted in 1D as compared to 3D, thus providing a clear signature of the crossover. By scaling the tunneling rate with respect to the pair binding energy, we observe a collapse of the data to a universal crossover point at a scaled tunneling value of 0.025(7).

5 pages, 4 figures

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
• The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
• Phase diagram of a two-component Fermi gas with resonant interactions
• Phase diagram of a strongly interacting polarized Fermi gas in one dimension
• Quasi-one-dimensional polarized Fermi superfluids
• Quasi-1D Bose-Einstein condensates in the dimensional crossover regime
• Theory of quasi-one dimensional imbalanced Fermi gases
• Cross-dimensional phase transition from an array of 1D Luttinger liquids to a 3D Bose-Einstein condensate
• Density profiles of polarized Fermi gases confined in harmonic traps

Cited by in corpus (18)

• The Physics of Pair Density Waves
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Evidence for a Spatially-Modulated Superfluid Phase of ${}^3$He under Confinement
• Thermometry of a deeply degenerate Fermi gas with a Bose-Einstein condensate
• Finite-temperature equation of state of polarized fermions at unitarity
• Pairing patterns in one-dimensional spin- and mass-imbalanced Fermi gases
• Collective modes of a soliton train in a Fermi superfluid
• Radial Fulde-Ferrell-Larkin-Ovchinnikov state in a population-imbalanced Fermi gas
• Simulating artificial one-dimensional physics with ultra-cold fermionic atoms: three exemplary themes
• Reentrant Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in the honeycomb lattice
• Spin-imbalance-induced transverse magnetization in the Hofstadter-Hubbard model
• Phase diagrams of polarized ultra-cold gases on attractive-U Hubbard ladders
• Dimensionally Induced Phase Transition of the Weakly Interacting Ultracold Bose Gas
• Hartree-Fock-Bogoliubov theory of trapped one-dimensional imbalanced Fermi systems
• Enhanced Fulde-Ferrell-Larkin-Ovchinnikov and Sarma superfluid states near an orbital Feshbach resonance
• Trapped imbalanced fermionic superfluids in one dimension: A variational approach
• The Gor'kov and Melik-Barkhudarov correction to the mean-field critical field transition to Fulde-Ferrell-Larkin-Ovchinnikov states
• Finite momentum condensate brought on by Zeeman field