The Hubbard model describes the physics of interacting particles on a lattice and is thought to contain elements essential to the superconductivity of the cuprates. Despite its apparent simplicity, solving the Hubbard model remains extremely challenging, especially at finite concentrations of hole dopants and intermediate temperatures. Wietek et al. used the minimally entangled typical thermal states (METTS) method to calculate the structural factors and thermodynamic properties for the two-dimensional Hubbard model with strong correlations at a finite doping and for a range of temperatures. The researchers found that a stripe order formed at low temperatures, whereas at higher temperatures, a phase resembling the experimentally observed pseudogap state took over.
Phys. Rev. X. 11, 0031007 (2021).