Polarons and bipolarons in Rydberg-dressed extended Bose-Hubbard model
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| Main Authors: | , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915644202549248 |
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| author | Domínguez-Castro, G. A. Santos, L. Ardila, L. A. Peña |
| author_facet | Domínguez-Castro, G. A. Santos, L. Ardila, L. A. Peña |
| contents | Impurities immersed in hard-core Bose gases offer exciting opportunities to explore polaron and bipolaron physics. We investigate the ground state properties of a single and a pair of impurities throughout the superfluid and insulating (charge density wave) phases of the bosonic environment. In the superfluid phase, the impurity exhibits polaron-like behavior, forming a dressed quasiparticle. In contrast, in the insulating phase, the impurity regains its particle-like character, moving through a potential landscape shaped by the charge density wave order. Moreover, we show that two impurities can form a bound state even in the absence of an explicit impurity-impurity coupling. We establish the stability of this bound state within both the superfluid and insulating phases. Our results offer valuable insights for ongoing lattice polaron experiments with ultracold gases. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_06275 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Polarons and bipolarons in Rydberg-dressed extended Bose-Hubbard model Domínguez-Castro, G. A. Santos, L. Ardila, L. A. Peña Quantum Gases Impurities immersed in hard-core Bose gases offer exciting opportunities to explore polaron and bipolaron physics. We investigate the ground state properties of a single and a pair of impurities throughout the superfluid and insulating (charge density wave) phases of the bosonic environment. In the superfluid phase, the impurity exhibits polaron-like behavior, forming a dressed quasiparticle. In contrast, in the insulating phase, the impurity regains its particle-like character, moving through a potential landscape shaped by the charge density wave order. Moreover, we show that two impurities can form a bound state even in the absence of an explicit impurity-impurity coupling. We establish the stability of this bound state within both the superfluid and insulating phases. Our results offer valuable insights for ongoing lattice polaron experiments with ultracold gases. |
| title | Polarons and bipolarons in Rydberg-dressed extended Bose-Hubbard model |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2411.06275 |