论文标题
伯特结合状态的非线性运输
Non-linear Transport by Bethe Bound States
论文作者
论文摘要
我们考虑在XXZ自旋链中的非线性弹道自旋传输，并在无限温度下为非线性的Drude重量$ d^{（3）} $得出分析结果。与线性的drude weight $ d^{（1）} $相反，我们发现结果不仅取决于各向异性，而且还取决于运输旋转电流的准粒子长度。我们的结果提供了对准粒子运输的进一步见解，并提出了有关Luttinger液体通用性的问题。
We consider non-linear ballistic spin transport in the XXZ spin chain and derive an analytical result for the non-linear Drude weight $D^{(3)}$ at infinite temperatures. In contrast to the linear Drude weight $D^{(1)}$, we find that the result not only depends on anisotropy but also on the string length of the quasiparticles transporting the spin current. Our result provides further insights into transport by quasiparticles and raises questions about Luttinger liquid universality.
