标题： 极端铁磁极限下的三态 Potts 量子自旋链的限制 显示英文标题

标题： Confinement in the three-state Potts quantum spin chain in extreme ferromagnetic limit

摘要： 我们使用横向磁场的微扰理论，研究极端铁磁 regime 下三态 Potts 量子自旋链的动力学。 我们证明，这种方法能够提供超出之前应用的经典半经典方法的特性，包括对共振激发的描述以及对量子淬火后时间演化的解析预测。 我们还证明，它与精确对角化和时间演化数值模拟得到的介子/泡谱结果一致。 显示英文摘要

摘要： We examine the dynamics of the three-state Potts quantum spin chain in the extreme ferromagnetic regime using perturbation theory in the transverse magnetic field. We demonstrate that this approach provides access to features well beyond the semiclassical method applied previously, including the description of resonant excitations and analytic prediction for the time evolution after a quantum quench. We also demonstrate that it agrees with the meson/bubble spectrum results from exact diagonalisation and the numerical simulations of the time evolution.