论文标题
二维大型$ n $ Hubbard-Heisenberg模型中的光诱导的预钟秩序参数动力学
Photoinduced prethermal order parameter dynamics in the two-dimensional large-$N$ Hubbard-Heisenberg model
论文作者
论文摘要
我们研究了二维相关电子模型中竞争有序相的微观动力学，该模型由有限持续时间的脉冲电场驱动。为了超越对电子相互作用的平均场地处理，我们采用了哈伯德模型的巨大概括，并将其与半经典的费米子费米式截断器近似作为时间演化方法相结合。这使我们能够计算出对平均场动力学的去校正校正，并获得固定状态，我们将其解释为行李序。我们使用该框架来模拟两个竞争阶段（键密度波和交错通量）之间的光引起的过渡，并发现脉冲后固定状态阶阶参数值不能单独通过吸收能量的量单独确定，而是明确取决于驱动频率和场方向。虽然在低频和高频方案中，两个prether液相之间的过渡发生在相似的总能量时，但我们确定了一个中间频率制度，它会以最小的加热发生。
We study the microscopic dynamics of competing ordered phases in a two-dimensional correlated electron model, which is driven with a pulsed electric field of finite duration. In order to go beyond a mean-field treatment of the electronic interactions we adopt a large-$N$ generalization of the Hubbard model and combine it with the semiclassical fermionic truncated Wigner approximation as a time evolution method. This allows us to calculate dephasing corrections to the mean-field dynamics and to obtain stationary states, which we interpret as prethermal order. We use this framework to simulate the light-induced transition between two competing phases (bond density wave and staggered flux) and find that the post-pulse stationary state order parameter values are not determined alone by the amount of absorbed energy but depend explicitly on the driving frequency and field direction. While the transition between the two prethermal phases takes place at similar total energies in the low- and high-frequency regimes, we identify an intermediate frequency regime for which it occurs with minimal heating.
