Visualization of vortex bound states in polarized Fermi gases at unitarity

Hu, Hui; Liu, Xia-Ji; Drummond, Peter D.

Visualization of vortex bound states in polarized Fermi gases at unitarity

Authors

Hu, Hui

Liu, Xia-Ji

Drummond, Peter D.

Description

We analyse theoretically a single vortex in 3D trapped atomic Fermi gases with population polarization near a broad Feshbach resonance. Above a critical polarization the Andreev-like bound states inside the core become occupied for the majority component. As a result, the local density difference at the core center acquires a sudden rise at low temperautres. This provides a visualization of the lowest bound state within the absorption imaging technique. As the polarization increases, the core expands gradually, and correspondingly, the energy of the lowest bound state decreases.
4 pages, and 4 figures; Published version in PRL