| Jahr | 2024 |
| Autor(en) | Niklas Rasch, Aleksandr N. Mikheev, Thomas Gasenzer |
| Titel | Bogoliubov phonons in a Bose-Einstein condensate from the one-loop perturbative renormalization group |
| KIP-Nummer | HD-KIP 24-91 |
| KIP-Gruppe(n) | F27 |
| Dokumentart | Paper |
| Quelle | SciPost Phys. Core 7: 066, 2024; arXiv:2402.19239 [cond-mat.quant-gas] |
| doi | 10.21468/SciPostPhysCore.7.3.066 |
| Abstract (en) | Wilson's renormalization-group approach to the weakly-interacting single-component Bose gas is discussed within the symmetry-broken, condensate phase. Extending upon the work by Bijlsma and Stoof [Phys. Rev. A 54, 5085 (1996), see this http URL ], wave-function renormalization of the temporal derivative contributions to the effective action is included in order to capture sound-like quasiparticle excitations with wave lengths larger than the healing-length scale. By means of a suitable rescaling scheme we achieve convergence of the coupling flows, which serve as a means to determine the condensate depletion in accordance with Bogoliubov theory, as well as the interaction-induced shift of the critical temperature. |
| bibtex | @article{Rasch2024qzk,
author = {Rasch, Niklas and Mikheev, Aleksandr N. and Gasenzer, Thomas},
title = {Bogoliubov phonons in a Bose-Einstein condensate from the one-loop perturbative renormalization group},
journal = {SciPost Phys. Core},
year = {2024},
volume = {7},
pages = {066},
doi = {10.21468/SciPostPhysCore.7.3.066},
url = {https://doi.org/10.48550/arXiv.2402.19239}
} |
| URL | SciPost Phys. Core 7: 066, 2024 |
| URL | arXiv:2402.19239 [cond-mat.quant-gas] |
