一维波导中并置两原子的量子纠缠（英文）

Quantum entanglement of two collocated atoms in a one-dimensional waveguide

在线性离散关系下研究了一维波导中两个并列放置的原子之间的量子纠缠。为调查两原子间的纠缠度,用实空间方法计算了透射和反射光谱振幅,讨论了单光子的散射特性和纠缠态的并发性。结果表明:通过改变原子偶极-偶极相互作用可产生Fano线型的散射光谱,偶极-偶极相互作用可作为导致光谱Fano共振的一种可能的工具。通过调控原子-波导的耦合强度,量子并发也会发生Fano共振,可通过观察Fano共振推断出最大量子纠缠。

In the condition of linear dispersion relation, the quantum entanglement between two atoms placed paratactically in a one-dimensional waveguide is investigated. In order to investigate the entanglement degree between the two atoms, the transmission and reflection spectra amplitudes are calculated by using the real-space method, and the single-photon scattering properties and concurrence of the entangled states are discussed. Results show that the scattering spectra of Fano line shape occur by changing the atomic dipole-dipole interaction. The dipole-dipole interaction may be utilized as a possible tool to lead to spectral Fano resonance. The quantum concurrence can also occur Fano resonance by controlling the atom-waveguide coupling strength, and the maximum quantum entanglement can be inferred by observing Fano resonance.