2 research outputs found
Superfluidity and binary-correlations within clusters of fermions
We propose a method for simulating the behaviour of small clusters of
particles that explicitly accounts for all mean-field and binary-correlation
effects. Our approach leads to a set of variational equations that can be used
to study both the dynamics and thermodynamics of these clusters. As an
illustration of this method, we explore the BCS-BEC crossover in the simple
model of four fermions, interacting with finite-range potentials, in a harmonic
potential. We find, in the crossover regime, that the particles prefer to
occupy two distinct pair states as opposed to the one assumed by BCS theory