Counterflow of lattice polarons in harmonically confined optical lattices
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909685555134464 |
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| author | Isaule, Felipe Rojo-Francàs, Abel Morales-Molina, Luis Juliá-Díaz, Bruno |
| author_facet | Isaule, Felipe Rojo-Francàs, Abel Morales-Molina, Luis Juliá-Díaz, Bruno |
| contents | We study a mobile impurity in a one-dimensional harmonically confined optical lattice interacting repulsively with a bosonic bath. The behavior of the impurity across baths with superfluid and Mott-insulator domains is examined, including its full back-action effect on the bath. We characterize the bath-impurity phase diagram and reveal the appearance of a correlated counterflow phase, which we support with an analytical model for a mobile impurity-hole pair. This phase shows an extended combined insulator domain of unity filling but no independent domain of constant density. The transition to this phase features a sudden orthogonality and the change of the shape of the impurity's profile to that of a free particle in an infinite square well. The findings of this work suggest the appearance of unconventional counterflow in trapped imbalanced atomic mixtures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_09448 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Counterflow of lattice polarons in harmonically confined optical lattices Isaule, Felipe Rojo-Francàs, Abel Morales-Molina, Luis Juliá-Díaz, Bruno Quantum Gases Atomic Physics Quantum Physics We study a mobile impurity in a one-dimensional harmonically confined optical lattice interacting repulsively with a bosonic bath. The behavior of the impurity across baths with superfluid and Mott-insulator domains is examined, including its full back-action effect on the bath. We characterize the bath-impurity phase diagram and reveal the appearance of a correlated counterflow phase, which we support with an analytical model for a mobile impurity-hole pair. This phase shows an extended combined insulator domain of unity filling but no independent domain of constant density. The transition to this phase features a sudden orthogonality and the change of the shape of the impurity's profile to that of a free particle in an infinite square well. The findings of this work suggest the appearance of unconventional counterflow in trapped imbalanced atomic mixtures. |
| title | Counterflow of lattice polarons in harmonically confined optical lattices |
| topic | Quantum Gases Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2502.09448 |