Quantitative comparison between theoretical predictions and experimental results for the BCS-BEC crossover

TL;DR

This paper compares theoretical predictions with experimental data for the BCS-BEC crossover in trapped Fermi atoms, showing excellent agreement in density profiles, chemical potential, and gap, using a unified approach including pairing fluctuations.

Contribution

It introduces a single theoretical framework that accurately predicts experimental results for the BCS-BEC crossover, including density profiles, chemical potential, and gap.

Findings

Excellent match between theory and experiment for density profiles.

Theoretical predictions align with Quantum Monte Carlo simulations.

Accurate predictions of chemical potential and gap at unitarity.

Abstract

Theoretical predictions for the BCS-BEC crossover of trapped Fermi atoms are compared with recent experimental results for the density profiles of $^6$Li. The calculations rest on a single theoretical approach that includes pairing fluctuations beyond mean field. Excellent agreement with experimental results is obtained. Theoretical predictions for the zero-temperature chemical potential and gap at the unitarity limit are also found to compare extremely well with Quantum Monte Carlo simulations and with recent experimental results.