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PreprintarXiv licencearXiv

Moiré droplet of ultracold Bose gases in a twisted-bilayer optical lattice

  • Tianqi Luo
  • Jing Zhang
  • Xiaoling Cui
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Abstract

We report the emergence of Moiré droplet in two-dimensional ultracold bosons subjected to a spin-dependent optical lattice, effctively realizing a twisted-bilayer configuration. We show that the droplet formation dramatically enhances the visibility of Moiré pattern in the density profile, even for exceptionally weak lattice potentials. The Moiré pattern can be enhanced similarly by increasing the lattice depth, which, however, also induces droplet diffusion characterized by a spreading density profile. Furthermore, we demonstrate a dynamical generation of Moiré pattern by dragging a small droplet through a moving lattice. At appropriate velocities, the droplet undergoes bifurcation and exhibits pronounced Moiré pattern within periodic time intervals. Our results establish the ultracold droplet as a compelling platform for simulating interacting Moiré physics, particularly the interplay between Moiré lattice and bound-state formation.

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Cite

BibTeXRIS
BibTeX
@misc{luo2026moiré,
  title = {{Moiré droplet of ultracold Bose gases in a twisted-bilayer optical lattice}},
  author = {Tianqi Luo and Jing Zhang and Xiaoling Cui},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.28913},
  eprint = {2609.28913},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.28913},
}
RIS
TY  - UNPB
TI  - Moiré droplet of ultracold Bose gases in a twisted-bilayer optical lattice
AU  - Tianqi Luo
AU  - Jing Zhang
AU  - Xiaoling Cui
PY  - 2026
DA  - 2026/09/24
PB  - arXiv
DO  - 10.48550/arxiv.2609.28913
UR  - https://arxiv.org/abs/2609.28913
AB  - We report the emergence of Moiré droplet in two-dimensional ultracold bosons subjected to a spin-dependent optical lattice, effctively realizing a twisted-bilayer configuration. We show that the droplet formation dramatically enhances the visibility of Moiré pattern in the density profile, even for exceptionally weak lattice potentials. The Moiré pattern can be enhanced similarly by increasing the lattice depth, which, however, also induces droplet diffusion characterized by a spreading density profile. Furthermore, we demonstrate a dynamical generation of Moiré pattern by dragging a small droplet through a moving lattice. At appropriate velocities, the droplet undergoes bifurcation and exhibits pronounced Moiré pattern within periodic time intervals. Our results establish the ultracold droplet as a compelling platform for simulating interacting Moiré physics, particularly the interplay between Moiré lattice and bound-state formation.
ER  -