Density profile of noninteracting fermions in a rotating $2d$ trap at finite temperature

We study the average density of $N$ spinless noninteracting fermions in a $2d$ harmonic trap rotating with a constant frequency $\mathrm{\Omega }$ and in the presence of an additional repulsive central potential $\gamma \mathrm{/}{r}^2$. The average density at zero temperature was recently studied in Phys. Rev. A $\mathbf{\text{103}}$, 033321 (2021) and an interesting multi-layered “wedding cake” structure with a “hole” at the center was found for the density in the large $N$ limit. In this paper, we study the average density at finite temperature. We demonstrate how this “wedding-cake” structure is modified at finite temperature. These large $N$ results warrant going much beyond the standard Local Density Approximation. We also generalize our results to a wide variety of trapping potentials and demonstrate the universality of the associated scaling functions both in the bulk and at the edges of the “wedding-cake”.