Diagrammatic Pairing Fluctuations Approach to the BCS-BEC Crossover

Understand

This paper gives a survey of a diagrammatic approach for fermionic pairing fluctuations, which are relevant to the BCS-BEC crossover realized with ultracold Fermi gases.

• Emphasis will be given to the physical intuition about the relevant physical processes that can be associated with this approach.
• Specific results will be presented for thermodynamic and dynamical quantities, where a critical comparison with alternative diagrammatic approaches will also be attempted.