论文标题
使用Floquet绝热进化动态产生的四极极化
Dynamically generated quadrupole polarization using Floquet adiabatic evolution
论文作者
论文摘要
我们研究了$ s = 1 $量子自旋链的非平衡动力学，该链受到时间依赖的外部驱动，其中驱动频率随时间的函数而绝热降低（````floquet floquet dibibatic Evolution''）。我们表明，当驱动菱形各向异性术语（在挤压旋转状态的背景下被称为``两轴逆转''）的NéelAntyferromagnet时，我们能够诱导四倍极化的总体增强，同时抑制了Stagger Magnetatizated的阶级。该系统以净四极矩和抗核酸极相关的方式演变为新状态。一旦驾驶频率保持恒定，该状态长期保持稳定。另一方面，我们发现我们无法实现受对称保护的Haldane相的四极极化，这在这种驾驶中保持稳健。
We investigate the nonequilibrium dynamics of the $S=1$ quantum spin chain subjected to a time-dependent external drive, where the driving frequency is adiabatically decreased as a function of time (``Floquet adiabatic evolution''). We show that when driving the rhombic anisotropy term (known as the ``two-axis countertwisting'' in the context of squeezed spin states) of a Néel antiferromagnet, we are able to induce an overall enhancement in the quadrupole polarization, while at the same time suppressing the staggered magnetization order. The system evolves into a new state with a net quadrupole moment and antiferroquadrupolar correlations. This state remains stable at long times once the driving frequency is kept constant. On the other hand, we find that we cannot achieve a quadrupole polarization for the symmetry-protected Haldane phase, which remains robust against such driving.
