Magnetic ground states of highly doped two-leg Hubbard ladders with a particle bath
The study investigates magnetic ground states of highly doped two-leg Hubbard ladders by introducing a particle bath. In the highly doped region, the saturated ferromagnetic state breaks down, leading to complex phases like partially polarized and nonmagnetic states. The effective t-J model and three-site pair-hopping are crucial for understanding this competition between kinetic, potential, and magnetic energies.