Quantum dynamics of spinful impurity in ideal Bose gas
Abstract
We discuss the quench dynamics of an isolated system composed of a single spinful impurity in the transverse Rabi field and bath of non-interacting three- and two-dimensional bosons. Specifically, we consider the evolution of bosons and a spin-1/2 particle, initially prepared in a Bose-Einstein condensate state and a magnetic ground state, respectively, with the spin-dependent contact boson-impurity interaction switched on. Applying an original mean-field-like approximation, which naturally reflects the statistical effects of the bosonic bath, we calculate time-dependent components of the average impurity spin and the overlap of the wave function between initial and arbitrary time moments. A key prediction is a substantial speed-up in the decoherence (thermalization) dynamics of the spin degree of freedom compared to results obtained with the Chevy-like ansatz.
Related
- Polaronic Response of a Supersonic Impurity Strongly Coupled to a Bose Condensate
- Intercomponent vortex interaction and dynamics in a uniform Bose quantum liquid
- Large Deviations for the Bose--Einstein Condensate of the Ideal Gas in the Canonical Ensemble
- Ensemble-dependent condensate statistics and correlations in an ideal Bose gas
- Structure and dynamics of interface around a quenched impurity in a colloidal liquid film
BibTeX
@misc{hryhorchak2026quantum,
title = {{Quantum dynamics of spinful impurity in ideal Bose gas}},
author = {O. Hryhorchak and V. Pastukhov},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.28180},
eprint = {2609.28180},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.28180},
}
RIS
TY - UNPB
TI - Quantum dynamics of spinful impurity in ideal Bose gas
AU - O. Hryhorchak
AU - V. Pastukhov
PY - 2026
DA - 2026/09/23
PB - arXiv
DO - 10.48550/arxiv.2609.28180
UR - https://arxiv.org/abs/2609.28180
AB - We discuss the quench dynamics of an isolated system composed of a single spinful impurity in the transverse Rabi field and bath of non-interacting three- and two-dimensional bosons. Specifically, we consider the evolution of bosons and a spin-1/2 particle, initially prepared in a Bose-Einstein condensate state and a magnetic ground state, respectively, with the spin-dependent contact boson-impurity interaction switched on. Applying an original mean-field-like approximation, which naturally reflects the statistical effects of the bosonic bath, we calculate time-dependent components of the average impurity spin and the overlap of the wave function between initial and arbitrary time moments. A key prediction is a substantial speed-up in the decoherence (thermalization) dynamics of the spin degree of freedom compared to results obtained with the Chevy-like ansatz.
ER -