论文标题
带有rydberg穿着的中性原子的分数Chern绝缘子
The fractional Chern insulator with Rydberg-dressed neutral atoms
论文作者
论文摘要
拓扑非平凡的条带可以通过rydberg穿着的中性原子实现。我们提出了一个二维硬核玻色子模型，在蜂窝晶格上的带上具有拓扑结构，通过van der waals的互动来实现粒子跳跃，从而交换了两个相互作用的原子的rydberg状态，而与跳跃相关的非零阶段的rydberg状态是通过将激光场的光学阶段转移到激光磁场上的光片，从而创建了与跳的阶段。使用准确的对角度化和无限密度矩阵重新归一化组模拟，我们在系统中发现了Chern数字C = 1/2的分数Chern绝缘子相，在存在弱的多体相互作用的情况下，它可以持续存在。我们的研究表明，可以使用中性原子阵列研究分数Chern绝缘子。
Topological nontrivial bands can be realized via Rydberg-dressed neutral atoms. We propose a two-dimensional hard-core boson model with a topological ground enrgy at band on a honeycomb lattice, where the particle hopping is realized via van der Waals interaction that exchanges the Rydberg states of two interacting atoms, while nonzero phases associated with hopping is created by transferring the optical phase of laser fields to the atomic pair wave function. Using exactly diagonalization and infinite density matrix renormalization group simulation, we find in the system a fractional Chern insulator phase with a Chern number C = 1/2, which can persist in the presence of weak many-body interactions. Our studies indicate that fractional Chern insulators can be studied with neutral-atom arrays.
