Linear rotor in an ideal Bose gas near the threshold for binding
We study a linear rotor in a bosonic bath within the angulon formalism. Our focus is on systems where isotropic or anisotropic impurity-boson interactions support a shallow bound state. To study the fate of the angulon in the vicinity of bound-state formation, we formulate a beyond-linear-coupling a...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
January 2024
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| In: |
Physical review
Year: 2024, Volume: 109, Issue: 1, Pages: 014102-1-014102-16 |
| ISSN: | 2469-9969 |
| DOI: | 10.1103/PhysRevB.109.014102 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevB.109.014102 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.109.014102 
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| Author Notes: | Tibor Dome, Artem G. Volosniev, Areg Ghazaryan, Laleh Safari, Richard Schmidt, and Mikhail Lemeshko |
| Summary: | We study a linear rotor in a bosonic bath within the angulon formalism. Our focus is on systems where isotropic or anisotropic impurity-boson interactions support a shallow bound state. To study the fate of the angulon in the vicinity of bound-state formation, we formulate a beyond-linear-coupling angulon Hamiltonian. First, we use it to study attractive, spherically symmetric impurity-boson interactions for which the linear rotor can be mapped onto a static impurity. The well-known polaron formalism provides an adequate description in this limit. Second, we consider anisotropic potentials, and show that the presence of a shallow bound state with pronounced anisotropic character leads to a many-body instability that washes out the angulon dynamics. |
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| Item Description: | Online veröffentlicht: 5. Januar 2024 Gesehen am 30.07.2024 |
| Physical Description: | Online Resource |
| ISSN: | 2469-9969 |
| DOI: | 10.1103/PhysRevB.109.014102 |