Mott transition for a Lieb-Liniger gas in a shallow quasiperiodic potential: Delocalization induced by disorder
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866929599938560000 |
|---|---|
| author | Yao, Hepeng Tanzi, Luca Sanchez-Palencia, Laurent Giamarchi, Thierry Modugno, Giovanni D'Errico, Chiara |
| author_facet | Yao, Hepeng Tanzi, Luca Sanchez-Palencia, Laurent Giamarchi, Thierry Modugno, Giovanni D'Errico, Chiara |
| contents | Disorder or quasi-disorder is known to favor the localization in many-body Bose systems. Here in contrast, we demonstrate an anomalous delocalization effect induced by incommensurability in quasiperiodic lattices. Loading ultracold atoms in two shallow periodic lattices with equal amplitude and either equal or incommensurate spatial periods, we show the onset of a Mott transition not only in the periodic case but also in the quasiperiodic case. Upon increase of the incommensurate component of the potential we find that the Mott insulator turns into a delocalized superfluid. Our experimental results agree with quantum Monte Carlo calculations, showing anomalous delocalization induced by the interplay between the commensuration and interaction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_15318 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Mott transition for a Lieb-Liniger gas in a shallow quasiperiodic potential: Delocalization induced by disorder Yao, Hepeng Tanzi, Luca Sanchez-Palencia, Laurent Giamarchi, Thierry Modugno, Giovanni D'Errico, Chiara Quantum Gases Disordered Systems and Neural Networks Disorder or quasi-disorder is known to favor the localization in many-body Bose systems. Here in contrast, we demonstrate an anomalous delocalization effect induced by incommensurability in quasiperiodic lattices. Loading ultracold atoms in two shallow periodic lattices with equal amplitude and either equal or incommensurate spatial periods, we show the onset of a Mott transition not only in the periodic case but also in the quasiperiodic case. Upon increase of the incommensurate component of the potential we find that the Mott insulator turns into a delocalized superfluid. Our experimental results agree with quantum Monte Carlo calculations, showing anomalous delocalization induced by the interplay between the commensuration and interaction. |
| title | Mott transition for a Lieb-Liniger gas in a shallow quasiperiodic potential: Delocalization induced by disorder |
| topic | Quantum Gases Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2402.15318 |