title: 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}Li 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 t with respect to the pair binding energy ε_{B}, we observe a collapse of the data to a universal crossover point at a scaled tunneling value of t[over ˜]_{c}=0.025(7).
authors.affiliation: Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA.
authors.forename: Melissa C
authors.initials: MC
authors.lastname: Revelle
authors.affiliation: Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA.
authors.forename: Jacob A
authors.initials: JA
authors.lastname: Fry
authors.affiliation: Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA.
authors.forename: Ben A
authors.initials: BA
authors.lastname: Olsen
authors.affiliation: Department of Physics and Astronomy and Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA.
authors.forename: Randall G
authors.initials: RG
authors.lastname: Hulet