Evolution of a single spin in ideal Bose gas at finite temperatures
Abstract
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.
Fields of Study & Subjects
Cold Atom Physics and Bose-Einstein Condensates
Quantum
superfluid
helium dynamics
Quantum many-body systems
Publication details
- Journal / source
- Journal of Physics A Mathematical and Theoretical
- Publisher
- IOP Publishing
- Volume
- 59
- Issue
- 22
- Pages
- 225304–225304
- Publication date
- 22 May 2026
- Language
- EN