Revelle, Melissa C.Fry, Jacob A.Olsen, Ben A.Hulet, Randall G.2017-05-022017-05-022016Revelle, Melissa C., Fry, Jacob A., Olsen, Ben A., et al.. "1D to 3D Crossover of a Spin-Imbalanced Fermi Gas." <i>Physical Review Letters,</i> 117, no. 23 (2016) American Physical Society: https://doi.org/10.1103/PhysRevLett.117.235301.https://hdl.handle.net/1911/94119We have characterized the one-dimensional (1D) to three-dimensional (3D) crossover of a two-component spin-imbalanced Fermi gas of 6Li 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 εB, we observe a collapse of the data to a universal crossover point at a scaled tunneling value of ˜tc=0.025(7).engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttps://doi.org/10.1103/PhysRevLett.117.235301