Hard-core bosons in flat band systems above the critical density
We investigate the behaviour of hard-core bosons in one- and two-dimensional flat band systems, the chequerboard and the kagomé lattice and one-dimensional analogues thereof. The one-dimensional systems have an exact local reflection symmetry which allows for exact results. We show that above the c...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
13 November 2017
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| In: |
The European physical journal. B, Condensed matter and complex systems
Year: 2017, Jahrgang: 90, Heft: 11 |
| ISSN: | 1434-6036 |
| DOI: | 10.1140/epjb/e2017-80218-1 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1140/epjb/e2017-80218-1 Verlag, Volltext: https://link.springer.com/article/10.1140/epjb/e2017-80218-1 
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| Verfasserangaben: | Moritz Drescher and Andreas Mielke |
MARC
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| 520 | |a We investigate the behaviour of hard-core bosons in one- and two-dimensional flat band systems, the chequerboard and the kagomé lattice and one-dimensional analogues thereof. The one-dimensional systems have an exact local reflection symmetry which allows for exact results. We show that above the critical density an additional particle forms a pair with one of the other bosons and that the pair is localised. In the two-dimensional systems exact results are not available but variational results indicate a similar physical behaviour. | ||
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