Transverse Field Dependence of the Ground State in the Z2 Bose-Hubbard Model
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866917903279849472 |
|---|---|
| author | Watanabe, Yuma Watabe, Shohei Nikuni, Tetsuro |
| author_facet | Watanabe, Yuma Watabe, Shohei Nikuni, Tetsuro |
| contents | The study of interaction between the particle and lattice degrees of freedom is one of the central interests in the quantum many-body systems. The Z2 Bose-Hubbard model has been proposed to describe ultracold bosons in a dynamical optical lattice. This model introduces the lattice degrees of freedom by placing half-spins on the bonds between neighboring lattice sites. In this study, we investigate the effect of spin fluctuations on the ground state by using the density-matrix renormalization group method. By calculating the spin structure factor and the compressibility, we show that there is a phase transition between two spatially nonuniform states. We also discuss the ground state in the strong transverse magnetic field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_15490 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Transverse Field Dependence of the Ground State in the Z2 Bose-Hubbard Model Watanabe, Yuma Watabe, Shohei Nikuni, Tetsuro Quantum Gases The study of interaction between the particle and lattice degrees of freedom is one of the central interests in the quantum many-body systems. The Z2 Bose-Hubbard model has been proposed to describe ultracold bosons in a dynamical optical lattice. This model introduces the lattice degrees of freedom by placing half-spins on the bonds between neighboring lattice sites. In this study, we investigate the effect of spin fluctuations on the ground state by using the density-matrix renormalization group method. By calculating the spin structure factor and the compressibility, we show that there is a phase transition between two spatially nonuniform states. We also discuss the ground state in the strong transverse magnetic field. |
| title | Transverse Field Dependence of the Ground State in the Z2 Bose-Hubbard Model |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2501.15490 |