Impurity immersed in a two-component few-fermion mixture in a one-dimensional harmonic trap
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arXiv
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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912802390671360 |
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| author | Teske, Marek Sowiński, Tomasz |
| author_facet | Teske, Marek Sowiński, Tomasz |
| contents | We investigate a one-dimensional three-component few-fermion mixture confined in a parabolic external trap, where one component contains a single particle acting as an impurity. Focusing on the many-body ground state, we analyze how the interactions between the impurity and the other components influence the system's structure. For fixed interaction strengths within the mixture, we identify a critical interaction strength with the impurity for which the system undergoes a structural transition characterized by a substantial change in its spatial features. We explore this transition from the point of view of correlations and ground-state susceptibility. We remarkably find that this transition exhibits unique universality features not previously observed in other systems, highlighting novel many-body properties existing in multi-component fermionic mixtures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_01625 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Impurity immersed in a two-component few-fermion mixture in a one-dimensional harmonic trap Teske, Marek Sowiński, Tomasz Quantum Gases We investigate a one-dimensional three-component few-fermion mixture confined in a parabolic external trap, where one component contains a single particle acting as an impurity. Focusing on the many-body ground state, we analyze how the interactions between the impurity and the other components influence the system's structure. For fixed interaction strengths within the mixture, we identify a critical interaction strength with the impurity for which the system undergoes a structural transition characterized by a substantial change in its spatial features. We explore this transition from the point of view of correlations and ground-state susceptibility. We remarkably find that this transition exhibits unique universality features not previously observed in other systems, highlighting novel many-body properties existing in multi-component fermionic mixtures. |
| title | Impurity immersed in a two-component few-fermion mixture in a one-dimensional harmonic trap |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2507.01625 |