Topological floating phase of dipolar bosons in an optical ladder
Abstract
Ultracold dipolar hard-core bosons in optical ladders provide exciting possibilities for the quantum simulation of anisotropic XXZ spin ladders. We show that introducing a tilt along the rungs results in a rich phase diagram at unit filling. In particular, for a sufficiently strong dipolar strength, the interplay between the long-range tail of the dipolar interactions and the tilting leads to the emergence of a quantum floating phase, a critical phase with incommensurate density-density correlations. Interestingly, the study of the entanglement spectrum, reveals that the floating phase is topological, constituting an intermediate gapless stage in the melting of a crystal into a gapped topological Haldane phase. This novel scenario for topological floating phases in dipolar XXZ ladders can be investigated in on-going experiments.
Cite
@article{arxiv.2407.15710,
title = {Topological floating phase of dipolar bosons in an optical ladder},
author = {Henning Korbmacher and Gustavo A. Domínguez-Castro and Mateusz Łącki and Jakub Zakrzewski and Luis Santos},
journal= {arXiv preprint arXiv:2407.15710},
year = {2025}
}