Spin dynamics of large-spin (spinor) fermions in a harmonic trap
Abstract
Understanding the collective dynamics in a many-body system has been a central task in condensed matter physics. To achieve this task, we develop a Hartree-Fock theory to study the collective oscillations of spinor Fermi system, motivated by recent experiment on spin-9/2 fermions. We observe an oscillation period shoulder for small rotation angles. Different from previous studies, where the shoulder is found connected to the resonance from periodic to running phase, here the system is always in a running phase in the two-body phase space. This shoulder survives even in the many-body oscillations, which could be tested in the experiments. We also show how these collective oscillations evolve from two- to many-body. Our theory provides an alternative way to understand the collective dynamics in large-spin Fermi systems.
Keywords
Cite
@article{arxiv.1604.07933,
title = {Spin dynamics of large-spin (spinor) fermions in a harmonic trap},
author = {Junjun Xu and Tongtong Feng and Qiang Gu},
journal= {arXiv preprint arXiv:1604.07933},
year = {2017}
}
Comments
13 pages, 8 figures, to appear in Annals of Physics