Properties of Spin-polarized Impurities — Ferrons, in the Unitary Fermi Gas

摘要

A new excitation mode has been predicted to exist in the unitary Fermigas. It has a form of a spin-polarized impurity, which was dubbed as ferron.It is characterized by a closed nodal surface of the pairing field surroundinga partially spin-polarized superfluid region, where the phase differs by π.In this paper, we discuss the effect of temperature on the generation of theferron and the adiabaticity of the spin-polarizing potential together withferron’s ground-state properties.