Ground-state ferromagnetic transition in strongly repulsive one-dimensional Fermi gases
Ground-state ferromagnetic transition in strongly repulsive one-dimensional Fermi gases
We prove that as a one-dimensional Fermi gas is brought across the resonance adiabatically from large repulsion to large attraction, the singlet ground state will give way to the maximum spin state, which is the lowest energy state among the states accessible to the system in this process. In the …