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BEC-BCS crossover of a trapped two-component Fermi gas with unequal masses
We determine the energetically lowest-lying states in the BEC-BCS crossover regime of $s$-wave interacting two-component Fermi gases under harmonic confinement by solving the many-body Schr\"odinger equation using two distinct approaches. Essentially exact basis set expansion techniques are applied to determine the energy spectrum of systems with $N=4$ fermions. Fixed-node diffusion …