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).

arXiv comment5 pages, 4 figures

References in corpus (26)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Realization of Bose-Einstein condensates in lower dimensions
• Pairing and Phase Separation in a Polarized Fermi Gas
• Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
• Spin-Imbalance in a One-Dimensional Fermi Gas
• Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
• Confinement induced molecules in a 1D Fermi gas
• The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
• Atom-Atom Scattering Under Cylindrical Harmonic Confinement: Numerical and Analytical Studies of the Confinement Induced Resonance
• Phase diagram of a two-component Fermi gas with resonant interactions
• Attractive Fermi gases with unequal spin populations in highly elongated traps
• Precise characterization of ^6Li Feshbach resonances using trap-sideband resolved RF spectroscopy of weakly bound molecules
• Phase diagram of a strongly interacting polarized Fermi gas in one dimension
• Imbalanced Feshbach-resonant Fermi gases
• Elastic and inelastic collisions of 6Li in magnetic and optical traps
• Quasi-one-dimensional polarized Fermi superfluids
• Dimensional Crossover in Quasi One-Dimensional and High T_c Superconductors
• Quasi-1D Bose-Einstein condensates in the dimensional crossover regime
• Theory of quasi-one dimensional imbalanced Fermi gases
• Quantum Monte Carlo study of the 3D-1D crossover for a trapped Bose gas
• Cross-dimensional phase transition from an array of 1D Luttinger liquids to a 3D Bose-Einstein condensate
• Phase Diagram of a Strongly Interacting Spin-Imbalanced Fermi Gas
• Pair tunneling, phase separation and dimensional crossover in imbalanced fermionic superfluids in a coupled array of tubes
• Non-local quantum fluctuations and fermionic superfluidity in the imbalanced attractive Hubbard model
• Density profiles of polarized Fermi gases confined in harmonic traps

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• The Physics of Pair Density Waves
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
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• 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
• Dimensional Crossover in a Spin-imbalanced Fermi gas
• 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
• Trapped imbalanced fermionic superfluids in one dimension: A variational approach
• Enhanced Fulde-Ferrell-Larkin-Ovchinnikov and Sarma superfluid states near an orbital Feshbach resonance
• 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