论文标题
大磁场中抗铁磁kitaev模型的动态结构因子
Dynamic structure factor of the antiferromagnetic Kitaev model in large magnetic fields
论文作者
论文摘要
我们通过应用扰动连续的统一转换，对高场限制进行了磁场中的抗磁性Kitaev蜂窝模型的动态结构因子。计算了高场极化相的装饰基本自旋flip激励的一夸西比颗粒性能，该爆发是计算动态结构因子中大部分光谱重量的。我们讨论了这些准颗粒扇区中光谱特征的演变，该扇区以一分粒子的分散体，两数quasiparticle continua，抗体状态的形成和准粒子衰减。特别是，在最上方两量质粒子连续体的上边缘上方上方的光谱特征相对强，代表了三个抗体状态，这些状态是由于最近邻邻密度密度相互作用而形成的。
We investigate the dynamic structure factor of the antiferromagnetic Kitaev honeycomb model in a magnetic field by applying perturbative continuous unitary transformations about the high-field limit. One- and two-quasiparticle properties of the dressed elementary spin-flip excitations of the high-field polarized phase are calculated which account for most of the spectral weight in the dynamic structure factor. We discuss the evolution of spectral features in these quasiparticle sectors in terms of one-quasiparticle dispersions, two-quasiparticle continua, the formation of antibound states, and quasiparticle decay. In particular, a comparably strong spectral feature above the upper edge of the upmost two-quasiparticle continuum represents three antibound states which form due to nearest-neighbor density-density interactions.
