论文标题
在驱动的哈伯德系统中的异常自旋电荷分离
Anomalous spin-charge separation in a driven Hubbard system
论文作者
论文摘要
旋转电荷分离（SCS）是低维量子系统中强相关性强相关的惊人表现，从而，费米子将以不同速度传播的单独的自旋和电荷激发分开。在这里，我们证明了周期性的驾驶可以控制半填充的哈伯德系统中的SC。在一个维度上，我们可以在分析上预测一个外来制度，其中电荷传播的速度比自旋慢，甚至可以与数值计算一致。在二维中，驾驶既放慢电荷和自旋，又导致单粒子和配对过程之间的复杂干扰。
Spin-charge separation (SCS) is a striking manifestation of strong correlations in low-dimensional quantum systems, whereby a fermion splits into separate spin and charge excitations that travel at different speeds. Here, we demonstrate that periodic driving enables control over SCS in a Hubbard system near half-filling. In one dimension, we predict analytically an exotic regime where charge travels slower than spin and can even become 'frozen', in agreement with numerical calculations. In two dimensions, the driving slows both charge and spin, and leads to complex interferences between single-particle and pair-hopping processes.
