Emergent interaction-induced topology in Bose-Hubbard ladders
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arXiv
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| Format: | Preprint |
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2024
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| author | Wellnitz, David Domínguez-Castro, Gustavo A. Bilitewski, Thomas Aidelsburger, Monika Rey, Ana Maria Santos, Luis |
| author_facet | Wellnitz, David Domínguez-Castro, Gustavo A. Bilitewski, Thomas Aidelsburger, Monika Rey, Ana Maria Santos, Luis |
| contents | We investigate the quantum many-body dynamics of bosonic atoms hopping in a two-leg ladder with strong on-site contact interactions. We observe that when the atoms are prepared in a staggered pattern with pairs of atoms on every other rung, singlon defects, i.e.~rungs with only one atom, can localize due to an emergent topological model, even though the underlying model in the absence of interactions admits only topologically trivial states. This emergent topological localization results from the formation of a zero-energy edge mode in an effective lattice formed by two adjacent chains with alternating strong and weak hoping links (Su-Schrieffer-Heeger chains) and opposite staggering which interface at the defect position. Our findings open the opportunity to dynamically generate non-trivial topological behaviors without the need for complex Hamiltonian engineering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_05109 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergent interaction-induced topology in Bose-Hubbard ladders Wellnitz, David Domínguez-Castro, Gustavo A. Bilitewski, Thomas Aidelsburger, Monika Rey, Ana Maria Santos, Luis Quantum Gases Quantum Physics We investigate the quantum many-body dynamics of bosonic atoms hopping in a two-leg ladder with strong on-site contact interactions. We observe that when the atoms are prepared in a staggered pattern with pairs of atoms on every other rung, singlon defects, i.e.~rungs with only one atom, can localize due to an emergent topological model, even though the underlying model in the absence of interactions admits only topologically trivial states. This emergent topological localization results from the formation of a zero-energy edge mode in an effective lattice formed by two adjacent chains with alternating strong and weak hoping links (Su-Schrieffer-Heeger chains) and opposite staggering which interface at the defect position. Our findings open the opportunity to dynamically generate non-trivial topological behaviors without the need for complex Hamiltonian engineering. |
| title | Emergent interaction-induced topology in Bose-Hubbard ladders |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2409.05109 |