Stabilization of Hubbard-Thouless pumps through nonlocal fermionic repulsion
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866914712343543808 |
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| author | Argüello-Luengo, Javier Mark, Manfred J. Ferlaino, Francesca Lewenstein, Maciej Barbiero, Luca Julià-Farré, Sergi |
| author_facet | Argüello-Luengo, Javier Mark, Manfred J. Ferlaino, Francesca Lewenstein, Maciej Barbiero, Luca Julià-Farré, Sergi |
| contents | Thouless pumping represents a powerful concept to probe quantized topological invariants in quantum systems. We explore this mechanism in a generalized Rice-Mele Fermi-Hubbard model characterized by the presence of competing onsite and intersite interactions. Contrary to recent experimental and theoretical results, showing a breakdown of quantized pumping induced by the onsite repulsion, we prove that sufficiently large intersite interactions allow for an interaction-induced recovery of Thouless pumps. Our analysis further reveals that the occurrence of stable topological transport at large interactions is connected to the presence of a spontaneous bond-order-wave in the ground-state phase diagram of the model. Finally, we discuss a concrete experimental setup based on ultracold magnetic atoms in an optical lattice to realize the newly introduced Thouless pump. Our results provide a new mechanism to stabilize Thouless pumps in interacting quantum systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_13375 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Stabilization of Hubbard-Thouless pumps through nonlocal fermionic repulsion Argüello-Luengo, Javier Mark, Manfred J. Ferlaino, Francesca Lewenstein, Maciej Barbiero, Luca Julià-Farré, Sergi Quantum Gases Quantum Physics Thouless pumping represents a powerful concept to probe quantized topological invariants in quantum systems. We explore this mechanism in a generalized Rice-Mele Fermi-Hubbard model characterized by the presence of competing onsite and intersite interactions. Contrary to recent experimental and theoretical results, showing a breakdown of quantized pumping induced by the onsite repulsion, we prove that sufficiently large intersite interactions allow for an interaction-induced recovery of Thouless pumps. Our analysis further reveals that the occurrence of stable topological transport at large interactions is connected to the presence of a spontaneous bond-order-wave in the ground-state phase diagram of the model. Finally, we discuss a concrete experimental setup based on ultracold magnetic atoms in an optical lattice to realize the newly introduced Thouless pump. Our results provide a new mechanism to stabilize Thouless pumps in interacting quantum systems. |
| title | Stabilization of Hubbard-Thouless pumps through nonlocal fermionic repulsion |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2308.13375 |