Tackling the Sign Problem in the Doped Hubbard Model with Normalizing Flows

ArXi:2603.18205v1 Announce Type: cross The Hubbard model at finite chemical potential is a cornerstone for understanding doped correlated systems, but simulations are severely limited by the sign problem. In the auxiliary-field formulation, the spin basis mitigates the sign problem, yet severe ergodicity issues have limited its use. We extend recent advances with normalizing flows at half-filling to finite chemical potential by