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.