论文标题
激光脉冲驱动的电荷和旋转顺序控制二维近代晶格
Laser pulse driven control of charge and spin order in the two-dimensional Kondo lattice
论文作者
论文摘要
量子相的快速和动态控制在设备中的量子现象的应用中非常需要。在实验侧，超快激光脉冲为诱导多种材料的飞秒动力学提供了理想的平台。在这里，我们表明，激光脉冲驱动的重型费米子系统可以被调整为动态演变为一个相位，该相位不存在于平衡中。使用最新的时间依赖性变分蒙特卡洛法，我们对应用于昆多晶格模型的逼真的激光脉冲进行数值模拟。通过跟踪自旋和电荷自由度，我们确定了从订购到金属状态的电荷的动态相变，同时保留了系统的自旋顺序。我们建议使用较高的谐波产生来识别超快实验中的动力学相变。
Fast and dynamical control of quantum phases is highly desired in the application of quantum phenomena in devices. On the experimental side, ultrafast laser pulses provide an ideal platform to induce femtosecond dynamics in a variety of materials. Here, we show that a laser pulse driven heavy fermion system, can be tuned to dynamically evolve into a phase, which is not present in equilibrium. Using the state-of-the-art time-dependent variational Monte Carlo method, we perform numerical simulations of realistic laser pulses applied to the Kondo Lattice model. By tracking spin and charge degrees of freedom we identify a dynamical phase transition from a charge ordered into a metallic state, while preserving the spin order of the system. We propose to use higher harmonic generation to identify the dynamical phase transition in an ultrafast experiment.
