<i>Ground-State Superfluid Phase Diagram of the Two-Dimensional Fermionic Hubbard Model with Next-Nearest-Neighbour Hopping</i>

In this work, we employ the Bold Diagrammatic Monte Carlo method to establish the superfluid phase diagram in terms of density and interaction strength and for several values of next-nearest-neighbour hopping. We find that although a multitude of superfluid states persists up to moderate interactions the picture changes severely compared to the weak-coupling interaction limit. We investigate into how relative proximity to the Van Hove filling affects superfluid order parameters and find that this effect diminishes with increasing interaction strength.