Density distribution of a trapped two-dimensional strongly interacting Fermi gas

Abstract

We calculate and measure the density distribution and cloud size of a trapped two-dimensional ${}^6$Li Fermi gas near a Feshbach resonance at low temperatures. Density distributions and cloud sizes are calculated for a wide range of interaction parameters using a local density approximation (LDA) and a zero-temperature equation of state obtained from quantum Monte Carlo simulations reported by G. Bertaina and S. Giorgini, Phys. Rev. Lett. \textbf{106}, 110403 (2011). We find that LDA predictions agree well with experimental measurements across a Feshbach resonance. Theoretical results for Tan's contact parameter in a trapped gas are reported along with predictions for static structure factor at large momentum which could be measured in future Bragg spectroscopy experiments on two-dimensional Fermi gases.

8 pages, 7 figures; Final version appeared in New Journal of Physics

References in corpus (17)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Radiofrequency spectroscopy of a strongly interacting two-dimensional Fermi gas
• Observation of a two-dimensional Fermi gas of atoms
• Fulde-Ferrell-Larkin-Ovchinnikov state in a perpendicular field of quasi two-dimensional CeCoIn5
• Crossover from 2D to 3D in a weakly interacting Fermi gas
• Universal Fermi gases in mixed dimensions
• Exact few-body results for strongly correlated quantum gases in two dimensions
• Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
• Berezinskii-Kosterlitz-Thouless transition in trapped quasi-two-dimensional Fermi gas near a Feshbach resonance
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• The effect of population imbalance on the Berezinskii-Kosterlitz-Thouless phase transition in a superfluid Fermi gas
• Confinement induced resonances in anharmonic waveguides
• Static structure factor of a strongly correlated Fermi gas at large momenta
• Imbalanced Fermi superfluid in a one-dimensional optical potential
• Visualization of vortex bound states in polarized Fermi gases at unitarity

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