Anisotropic and non-additive interactions of a Rydberg impurity in a quantum bath
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915530547396608 |
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| author | Durst, Aileen A. T. Rittenhouse, Seth T. Sadeghpour, H. R. Eiles, Matthew T. |
| author_facet | Durst, Aileen A. T. Rittenhouse, Seth T. Sadeghpour, H. R. Eiles, Matthew T. |
| contents | We present a framework for treating anisotropic and non-additive impurity-bath interactions - features that are ubiquitous in realistic quantum impurity problems, but are often neglected in conventional approaches relying on additive, spherically symmetric pseudopotentials. To illustrate this, we focus on a Rydberg atom immersed in a Bose-Einstein condensate, where the internal-state degeneracy of the Rydberg impurity gives rise to configuration-dependent non-additive potentials. With increasing interaction strength, anisotropy-induced partial-wave mixing generates distinct polaron and molaron resonances, allowing for radially and angularly excited bound states to become accessible. This approach captures the anisotropy and non-additivity characteristic of a Rydberg impurity immersed in a quantum bath, and provides broad applicability to a host of quantum impurity problems beyond the Fröhlich paradigm. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_01497 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anisotropic and non-additive interactions of a Rydberg impurity in a quantum bath Durst, Aileen A. T. Rittenhouse, Seth T. Sadeghpour, H. R. Eiles, Matthew T. Quantum Gases Atomic Physics Quantum Physics We present a framework for treating anisotropic and non-additive impurity-bath interactions - features that are ubiquitous in realistic quantum impurity problems, but are often neglected in conventional approaches relying on additive, spherically symmetric pseudopotentials. To illustrate this, we focus on a Rydberg atom immersed in a Bose-Einstein condensate, where the internal-state degeneracy of the Rydberg impurity gives rise to configuration-dependent non-additive potentials. With increasing interaction strength, anisotropy-induced partial-wave mixing generates distinct polaron and molaron resonances, allowing for radially and angularly excited bound states to become accessible. This approach captures the anisotropy and non-additivity characteristic of a Rydberg impurity immersed in a quantum bath, and provides broad applicability to a host of quantum impurity problems beyond the Fröhlich paradigm. |
| title | Anisotropic and non-additive interactions of a Rydberg impurity in a quantum bath |
| topic | Quantum Gases Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2510.01497 |