论文标题
在垂直淬灭场引起的双层哈伯德模型中的绝缘状态过渡
Insulating-to-conducting state transition in the bilayer Hubbard model induced by a perpendicular quench field
论文作者
论文摘要
具有不同参数的多体量子系统可以在同一能量壳中显示两个不同的量子状态。这允许从早温哈密顿量的基态向季后汉密尔顿后的稳定状态进行动态过渡。我们在两层半填充的哈伯德模型对垂直电场的两层式哈伯德模型中研究基态的动态响应。我们证明，当田地与现场排斥共振时，稳态表现出电导率，而初始状态是莫特的构造状态。此外，由于持久掺杂的形成，这两个层表现出相同的导电行为，这是电荷波动所证明的。实现这种动态过渡的关键因素是现场相互作用与共振场之间的合作相互作用，而不是它们扮演的个体角色。我们的发现为强相关系统中现场诱导的电导率提供了另一种机制。
A many-body quantum system with varying parameters can exhibit two distinct quantum states within the same energy shell. This allows for a dynamic transition from the ground state of the pre-quench Hamiltonian to a steady state of the post-quench Hamiltonian. We investigate the dynamic response of the ground states in a two-layer half-filled Hubbard model to a perpendicular electric field. We demonstrate that the steady state exhibits conductivity when the field is in resonance with the on-site repulsion, while the initial state is a Mott-insulating state. Additionally, the two layers exhibit identical conducting behavior due to the formation of long-lived dopings, as evidenced by the charge fluctuation. The key factor in achieving this dynamic transition is the cooperative interplay between on-site interactions and the resonant field, rather than the individual roles they play. Our findings offer an alternative mechanism for field-induced conductivity in strongly correlated systems.
