论文标题
从$π$ -Flux晶格上竞争的短期和远程相互作用的量子相过渡
Quantum phase transitions from competing short- and long-range interactions on a $π$-flux lattice
论文作者
论文摘要
通过使用平均场理论和决定性的量子Monte Carlo（DQMC）模拟，研究了由互动短期和长期相互作用组成的群集电相互作用的量子相变。这两种方法都识别出斑 - 二聚体相，该阶段从有限的相互作用强度发展。虽然其在DQMC中的签名相对较弱，但在自旋结构因子中揭示了明显的抗铁磁过渡。相应的临界相互作用和指数很容易通过有限尺寸的尺度获得，并具有可以很好地缩放的Plaquette-Dimer结构因子。这些结果表明，由$π$ -Flux晶格上的群集 - 电荷相互作用驱动的plaquette-dimer和抗磁磁相之间可能有一个解剖的量子临界点。
Quantum phase transitions from the cluster-charge interaction, which is composed of competing short- and long-range interactions, are investigated on a $π$-flux lattice by using the mean-field theory and determinant quantum Monte Carlo (DQMC) simulations. Both methods identify a plaquette-dimer phase, which develops from a finite interaction strength. While its signature in DQMC is relatively weak, a obvious antiferromagnetic transition is revealed in the spin structure factor instead. The corresponding critical interaction and exponents are readily obtained by finite-size scalings, with the plaquette-dimer structure factor that can also be well scaled. These results suggest a possible deconfined quantum critical point between the plaquette-dimer and antiferromagnetic phases driven by the cluster-charge interaction on a $π$-flux lattice.
