Isaule, F. , Morera, I., Massignan, P. and Juliá-Díaz, B. (2021) Renormalization-group study of Bose polarons. Physical Review A: Atomic, Molecular and Optical Physics, 104(2), 023317. (doi: 10.1103/PhysRevA.104.023317)
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Abstract
We study the properties of a single impurity in a dilute Bose gas, a Bose polaron, using the functional renormalization group. We use an ansatz for the effective action motivated by a derivative expansion, and we compute the energies of the attractive and repulsive branches of excitations in both two and three spatial dimensions. Three-body correlations play an important role in the attractive branch, and we account for those by including three-body couplings between two bath bosons and the impurity. Our calculations compare very favorably with state-of-the-art experimental measurements and numerical simulations.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Isaule Rodriguez, Dr Felipe |
| Authors: | Isaule, F., Morera, I., Massignan, P., and Juliá-Díaz, B. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review A: Atomic, Molecular and Optical Physics |
| Publisher: | American Physical Society |
| ISSN: | 1050-2947 |
| ISSN (Online): | 1094-1622 |
| Published Online: | 12 August 2021 |
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