一维耦合腔阵列的光谱特性
Spectral properties of coupled cavity arrays in one dimension
摘要：
用变分簇方法研究了一维耦合腔阵列的光谱特性。耦合腔阵列由两种不同的“粒子”组成，即光子和类原子激发。两种粒子类型的光谱功能进行评估和讨论。此外，还给出了态密度、动量分布和空间关联函数。基于这些信息，极化激元“准粒子”被适当地引入，波矢量和填充依赖于光子和类原子粒子的线性组合。计算了极化激元准粒子的谱函数和态密度，并分析了各分量的权重。
英文摘要：
Spectral properties of coupled cavity arrays in one dimension are investigated by means of the variational cluster approach. Coupled cavity arrays consist of two distinct "particles," namely, photons and atomiclike excitations. Spectral functions are evaluated and discussed for both particle types. In addition, densities of states, momentum distributions and spatial correlation functions are presented. Based on this information, polariton "quasiparticles" are introduced as appropriate, wave vector and filling dependent linear combinations of photon and atomiclike particles. Spectral functions and densities of states are evaluated for the polariton quasiparticles, and the weights of their components are analyzed.
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