Supersolid phases of Rydberg-excited bosons on a triangular lattice
Abstract
Recent experiments with ultracold Rydberg-excited atoms have shown that long-range interactions can give rise to spatially ordered structures. Observation of crystalline phases in a system with Rydberg atoms loaded into an optical lattice seems also within reach. Here we investigate a bosonic model on a triangular lattice suitable for description of such experiments. Numerical simulations based on bosonic dynamical mean-field theory reveal a rich phase diagram with different supersolid phases. Comparison with the results obtained for a square lattice geometry shows qualitatively similar results in a wide range of parameters, however, on a triangular lattice we do not observe the checkerboard supersolid. Moreover, unlike on a square lattice we did not find a phase transition from uniform superfluid to supersolid induced by increase of the hopping amplitude on a triangular lattice. Based on our results we propose an intuitive interpretation of the nature of different supersolid phases. We also propose parameters for the experimental realization.
Keywords
Cite
@article{arxiv.1903.01912,
title = {Supersolid phases of Rydberg-excited bosons on a triangular lattice},
author = {Jaromir Panas and Mathieu Barbier and Andreas Geißler and Walter Hofstetter},
journal= {arXiv preprint arXiv:1903.01912},
year = {2019}
}
Comments
13 pages, 8 figures