| Issue |
EPL
Volume 147, Number 6, September 2024
|
|
|---|---|---|
| Article Number | 65002 | |
| Number of page(s) | 7 | |
| Section | Atomic, molecular and optical physics | |
| DOI | https://doi.org/10.1209/0295-5075/ad763d | |
| Published online | 25 September 2024 | |
Functional renormalisation group approach to the finite-temperature Bose polaron
Instituto de Física, Pontificia Universidad Católica de Chile - Avenida Vicuña Mackenna 4860, Santiago, Chile
Received: 8 February 2024
Accepted: 2 September 2024
The functional renormalisation group (FRG) approach is employed to study Bose polarons at finite temperatures in the regime of strong attractive bath-impurity interactions. Both two- and three-dimensional configurations are considered. The appearance of two polaron quasiparticle branches at finite temperatures is revealed, consistent with recent findings by other analytical techniques. Ground-state polaron energies are also reported for selected interactions and temperatures within the gas superfluid phase. The findings of this work present the FRG as a useful tool for studying finite-temperature polarons in quantum gases.
© 2024 EPLA
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