Iversen Ole A, Pohl Thomas
Center for Complex Quantum Systems, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.
Phys Rev Lett. 2021 Feb 26;126(8):083605. doi: 10.1103/PhysRevLett.126.083605.
We study the correlated transport of photons through a chain of three-level emitters that are coupled chirally to a photonic mode of a waveguide. It is found that this system can transfer a weak classical input into a strongly correlated state of light in a unitary manner. Our analysis reveals two-photon scattering eigenstates, that are akin to Fano resonances or shape resonances in particle collisions and facilitate the emergence of antibunched light with long-range correlations upon crossing a critical length of the chain. By operating close to conditions of electromagnetically induced transparency of the three-level medium, a high degree of antibunching and photon transmission can be maintained in the presence of moderate losses. These features suggest a promising mechanism for single-photon generation and may open the door to exploring correlated quantum many-body states of light with repulsively interacting photons.
我们研究了光子通过与波导的光子模式手性耦合的三能级发射体链的关联输运。结果发现，该系统能够以幺正的方式将弱经典输入转换为强关联光态。我们的分析揭示了双光子散射本征态，这类似于粒子碰撞中的法诺共振或形状共振，并在链长超过临界长度时促进具有长程关联的反聚束光的出现。通过在接近三能级介质的电磁诱导透明条件下运行，在存在适度损耗的情况下可以保持高度的反聚束和光子传输。这些特性表明了一种很有前景的单光子产生机制，并可能为探索具有排斥相互作用光子的关联量子多体光态打开大门。
