Physics
Ground states of two-dimensional tilted dipolar bosons with density-induced hopping
Document Type
Article
Abstract
Motivated by recent experiments with ultracold magnetic atoms trapped in optical lattices where the orientation of atomic dipoles can be fully controlled by external fields, we study, by means of quantum Monte Carlo, the ground-state properties of dipolar bosons trapped in a two-dimensional lattice with density-induced hopping and where the dipoles are tilted along the xz plane. We present ground-state phase diagrams of the above system at different tilt angles. We find that as the dipolar interaction increases, the superfluid phase at half-filling factor is destroyed in favor of either a checkerboard or stripe solid phase for tilt angle θ30° or θ30°, respectively. More interesting physics happens at tilt angles θ58°, where we find that as the dipolar interaction strength increases, solid phases first appear at filling factor lower than 0.5. Moreover, unlike what is observed at lower tilt angles, we find that at half filling, a stripe supersolid intervenes between the superfluid and stripe solid phase.
Erratum: In regard to our original paper, we have realized that there was a typographical error in the Monte Carlo code we have used to get the phase diagrams of Fig. 3. As a result, U/t was not always constant and equal to 20 as stated in the paper. We have redone the simulations at U/t=20 and noticed that, while the original results are qualitatively correct, there exist quantitative differences in the position of the transition lines. Here, we report the corrected phase diagrams, obtained at fixed U/t=20 . Below we briefly describe the main quantitative changes in the phase diagrams.
Publication Title
Physical Review A
Publication Date
4-2021
Volume
103
Issue
4
ISSN
2469-9926
DOI
10.1103/PhysRevA.103.043333
Keywords
bosons, filling, optical lattices, quantum theory
Repository Citation
Zhang, Chao; Zhang, Jin; Yang, Jin; and Capogrosso-Sansone, Barbara, "Ground states of two-dimensional tilted dipolar bosons with density-induced hopping" (2021). Physics. 71.
https://commons.clarku.edu/faculty_physics/71
