论文标题
来自基质态相互作用的旋子的二维相干光谱
Two-dimensional coherent spectrum of interacting spinons from matrix-product states
论文作者
论文摘要
我们通过使用无限的时间不断发展的块拆卸方法，在二维相干光谱的背景下，在数值上计算伊辛阶梯模型的二阶和三阶非线性磁敏感性。 Ising梯子模型将一个量子链融合到极化旋转的浴场，从而影响Spinon激发的衰变。我们表明，其三阶敏感性在弱耦合方面包含一个强大的Spinon Echo信号，该信号在频率平面中作为高度各向异性峰出现在二维相干频谱中。 Spinon Echo峰揭示了旋转子的动力学特性。特别是，对应于高能旋子的光谱峰通过耦合增加而抑制了夫妇到浴缸，而这些峰却没有显示出显着变化。
We compute numerically the second and third order nonlinear magnetic susceptibilities of an Ising ladder model in the context of two-dimensional coherent spectroscopy by using the infinite time-evolving block decimation method. The Ising ladder model couples a quantum Ising chain to a bath of polarized spins, thereby effecting the decay of spinon excitations. We show that its third order susceptibility contains a robust spinon echo signal in the weak coupling regime, which appears in the two-dimensional coherent spectrum as a highly anisotropic peak in the frequency plane. The spinon echo peak reveals the dynamical properties of the spinons. In particular, the spectral peak corresponding to the high energy spinons, which couple to the bath, is suppressed with increasing coupling, whereas those do not show no significant changes.
