Spectral analysis of two-dimensional Bose-Hubbard models
One-dimensional Bose-Hubbard models are well known to obey a transition from regular to quantum-chaotic spectral statistics. We are extending this concept to relatively simple two-dimensional many-body models. Also in two dimensions a transition from regular to chaotic spectral statistics is found a...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
22 April 2016
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| In: |
Physical review
Year: 2016, Jahrgang: 93, Heft: 4 |
| ISSN: | 2469-9934 |
| DOI: | 10.1103/PhysRevA.93.043620 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.93.043620 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.93.043620 
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| Verfasserangaben: | David Fischer, Darius Hoffmann, and Sandro Wimberger |
| Zusammenfassung: | One-dimensional Bose-Hubbard models are well known to obey a transition from regular to quantum-chaotic spectral statistics. We are extending this concept to relatively simple two-dimensional many-body models. Also in two dimensions a transition from regular to chaotic spectral statistics is found and discussed. In particular, we analyze the dependence of the spectral properties on the bond number of the two-dimensional lattices and the applied boundary conditions. For maximal connectivity, the systems behave most regularly in agreement with the applicability of mean-field approaches in the limit of many nearest-neighbor couplings at each site. |
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| Beschreibung: | Gesehen am 19.05.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 2469-9934 |
| DOI: | 10.1103/PhysRevA.93.043620 |