A Mobile Impurity in the Kitaev Chain: Phase Diagram and Signatures of Topology
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866913838406828032 |
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| author | Sadovnikov, A. V. Bahovadinov, M. S. Rubtsov, A. N. Markov, A. A. |
| author_facet | Sadovnikov, A. V. Bahovadinov, M. S. Rubtsov, A. N. Markov, A. A. |
| contents | We study the physics of a mobile impurity immersed in a $1d$ topological superconductor. We discuss the system's phase diagram obtained with exact diagonalization. We argue that the character of the transition from a weak to strong coupling regime depends on the phase of the host superconductor. A smooth crossover between a weakly coupled polaron and a molecular state is observed in the topological phase. In contrast, the impurity undergoes a sharp phase transition in a topologically trivial background. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_09735 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Mobile Impurity in the Kitaev Chain: Phase Diagram and Signatures of Topology Sadovnikov, A. V. Bahovadinov, M. S. Rubtsov, A. N. Markov, A. A. Strongly Correlated Electrons Mesoscale and Nanoscale Physics We study the physics of a mobile impurity immersed in a $1d$ topological superconductor. We discuss the system's phase diagram obtained with exact diagonalization. We argue that the character of the transition from a weak to strong coupling regime depends on the phase of the host superconductor. A smooth crossover between a weakly coupled polaron and a molecular state is observed in the topological phase. In contrast, the impurity undergoes a sharp phase transition in a topologically trivial background. |
| title | A Mobile Impurity in the Kitaev Chain: Phase Diagram and Signatures of Topology |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2505.09735 |