Density Profiles of Strongly Interacting Trapped Fermi Gases

Abstract

We study density profiles in trapped fermionic gases, near Feshbach resonances, at all $T\le T_c$ and in the near-BEC and unitary regimes. For the latter, we quantify and characterize the generally neglected contribution from noncondensed Cooper pairs. As a consequence of these pairs, our profiles are rather well fit to a Thomas-Fermi (TF) functional form, and equally well fit to experimental data. Our work lends support to the notion that TF fits can be used in an experimental context to obtain information about the temperature.

4 pages, 3 figures, submitted to PRL; significant changes to figures and text; typos and references corrected

References in corpus (5)

• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Collective excitations of a degenerate gas at the BEC-BCS crossover
• Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover
• Breakdown of Hydrodynamics in the Radial Breathing Mode of a Strongly-Interacting Fermi Gas

Cited by in corpus (29)

• Theory of ultracold Fermi gases
• Heat Capacity of a Strongly-Interacting Fermi Gas
• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Finite-Temperature Collective Dynamics of a Fermi Gas in the BEC-BCS Crossover
• Thermodynamics of Interacting Fermions in Atomic Traps
• Is a gas of strongly interacting atomic fermions a nearly perfect fluid?
• Pseudogaps in strongly interacting Fermi gases
• Radio frequency spectroscopy and the pairing gap in trapped Fermi gases
• Superfluid phase diagrams of trapped Fermi gases with population imbalance
• Applying BCS-BEC Crossover Theory To High Temperature Superconductors and Ultracold Atomic Fermi Gases
• Thermodynamics and superfluid density in BCS-BEC crossover with and without population imbalance
• Comparison of Different Pairing Fluctuation Approaches to BCS-BEC Crossover
• Pseudogap phenomena in ultracold atomic Fermi gases
• Dressed Feshbach molecules in the BEC-BCS crossover
• Understanding the superfluid phase diagram in trapped Fermi gases
• Finite temperature effects in trapped Fermi gases with population imbalance
• First and second sound modes at finite temperature in trapped Fermi gases from BCS to BEC
• Finite Temperature Momentum Distribution of a Trapped Fermi Gas
• Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas
• Trapped Resonant Fermions above Superfluid Transition Temperature
• Magnetism and quantum phase transitions in spin-1/2 attractive fermions with polarization
• BEC-BCS crossover of a trapped Fermi gas without using the local density approximation
• Bogoliubov theory of Feshbach molecules in the BEC-BCS crossover
• Fermi liquid theory of ultra-cold trapped Fermi gases: Implications for Pseudogap Physics and Other Strongly Correlated Phases
• Thermodynamic Properties of Rashba Spin-Orbit-Coupled Fermi Gas
• Fermionic superfluidity: From high Tc superconductors to ultracold Fermi gases
• Superfluidity in atomic Fermi gases
• Characterizing Real-space Topology in Rice-Mele Model by Thermodynamics
• What can ultracold Fermi gases teach us about high $T_c$ superconductors and vice versa?