Evolution of a single spin in ideal Bose gas at finite temperatures
Quantum Gases
2026-05-14 v2 Quantum Physics
Abstract
We study the finite-temperature dynamics of non-interacting bosons with a single static spinful impurity immersed. A non-zero contact boson-impurity pairwise interaction is assumed only for the spin-up impurity state. By tracing out bosonic degrees of freedom, the exact time evolution of the impurity spin is calculated for pure and mixed initial ensembles of states. The time-dependent momentum distribution of bosons initially created in the Bose-condensed state and driven by the interaction with spin is analyzed.
Cite
@article{arxiv.2504.09619,
title = {Evolution of a single spin in ideal Bose gas at finite temperatures},
author = {O. Hryhorchak and G. Panochko and V. Pastukhov},
journal= {arXiv preprint arXiv:2504.09619},
year = {2026}
}
Comments
7 pages, 4 figures