Long-range interactions and superstripe formation are hot topics of research in AMO and many-body lattice physics, where long-range interactions present unique theoretical challenges. We investigated a rather generic extended Hubbard model for bosons on a lattice with interactions interpolating between short- and infinite-range allowing for exact solutions by quantum Monte Carlo methods. We predict a novel type of stripe crystal at strong coupling. Most interestingly, for intermediate interaction strengths the stripes can turn superfluid into a self-assembled array of quasi-one-dimensional superfluids (bosonic superstripes) reminiscent of classical soft-matter models, different from the mechanisms that have generated much interest in recent years.
This work has now been published in Physical Review Letters: Physical Review Letters 123, 045301 (2019).