Ultralong-range order in the Fermi-Hubbard model with long-range interactions
Ultralong-range order in the Fermi-Hubbard model with long-range interactions
We use the dual boson approach to reveal the phase diagram of the Fermi-Hubbard model with long-range dipole-dipole interactions. By using a large-scale finite-temperature calculation on a $64\ifmmode\times\else\texttimes\fi{}64$ square lattice we demonstrate the existence of a novel phase, possessing an ``ultralong-range'' order. The fingerprint of this phase---the density correlation function---features …