Fractional particles in anisotropic-two-dimensional quantum systems

点击翻译按钮获取中文摘要

We investigated how quasiparticles having fractional quantum numbers in one-dimensional chains change into those with integer quantum numbers in higher dimensions, by using a weak-interchain-coupling approach combined with exact solutions. We found that quasiparticles carrying fractional quantum numbers form bound states due to interchain processes. In terms of the resultant quasiparticles, anomalous dynamical features observed in a frustrated anisotropic-two-dimensional antiferromagnet in a magnetic field are quantitatively explained in a unified manner.