论文标题
光腔中二维Rydberg原子阵列的量子相变
Quantum phase transition of the two-dimensional Rydberg atom array in an optical cavity
论文作者
论文摘要
我们在曲菲尔德理论和大规模量子蒙特卡洛模拟的帮助下研究了光腔中的二维Rydberg原子阵列。 Rydberg原子之间的强偶极双极相互作用可以使系统表现出晶体结构，并且两级原子与空腔光子模式之间的耦合可以导致形成极化。它们之间的相互作用提供了丰富的量子相图，包括Mott，Solid-1/2，超级和超级固体相。作为两阶共存阶段，超级固相断裂均转化和u（1）对称性。基于数值和分析结果，我们发现超级固体的区域比一维情况大得多，因此在实验中可以更容易地观察到它。最后，我们讨论了rydberg原子的能量间隙如何影响量子相变的类型和三重点的数量。
We study the two-dimensional Rydberg atom array in an optical cavity with help of the meanfield theory and the large-scale quantum Monte Carlo simulations. The strong dipole-dipole interactions between Rydberg atoms can make the system exhibit the crystal structure, and the coupling between two-level atom and cavity photon mode can result in the formation of the polariton. The interplay between them provides a rich quantum phase diagram including the Mott, solid-1/2, superradiant and superradiant solid phases. As the two-order co-existed phase, the superradiant solid phase breaks both translational and U(1) symmetries. Based on both numerical and analytic results, we found the region of superradiant solid is much larger than one dimensional case, so that it can be more easily observed in the experiment. Finally, we discuss how the energy gap of the Rydberg atom can affect the type of the quantum phase transition and the number of triple points.
