论文标题
在广义迪克模型中的多政治和量子波动
Multicriticality and quantum fluctuation in generalized Dicke model
论文作者
论文摘要
我们考虑了DICKE模型的重要概括，其中多级原子，而不是像常规Dicke模型中的两级原子，与单个光子模式相互作用。我们探讨了广泛的原子 - 光子耦合方案的相图，并表明在这种概括下，迪克模型可以成为多政治。对于实验可实现的方案的子类，可以通过紧凑的形式在分析上表达任意秩序的多政治条件。我们还计算了关键和非关键病例的原子 - 光子纠缠熵。我们发现，关键性的顺序强烈影响关键的纠缠熵：高阶会产生更强的纠缠。我们的工作提供了对量子相变和多政治性的深刻见解。
We consider an important generalization of the Dicke model in which multi-level atoms, instead of two-level atoms as in conventional Dicke model, interact with a single photonic mode. We explore the phase diagram of a broad class of atom-photon coupling schemes and show that, under this generalization, the Dicke model can become multicritical. For a subclass of experimentally realizable schemes, multicritical conditions of arbitrary order can be expressed analytically in compact forms. We also calculate the atom-photon entanglement entropy for both critical and non-critical cases. We find that the order of the criticality strongly affects the critical entanglement entropy: higher order yields stronger entanglement. Our work provides deep insight into quantum phase transitions and multicriticality.
