论文标题
非马克维亚波导QED中结合状态的最佳两光子激发
Optimal two-photon excitation of bound states in non-Markovian waveguide QED
论文作者
论文摘要
结合状态在波导QED系统中产生，发射器和光子模式之间耦合的频率依赖性很强。尽管不可能用单个光子波包进行令人兴奋的界限，但发射器介导的光子 - 光子相互作用可用于以两光子状态激发它们。在这封信中，我们使用散射理论为一般的非马克维亚波导QED系统提供了这种激发概率的上限，并表明可以通过两光子波包来达到此限制，并且总光子能量的不确定性消失了。此外，我们还分析了具有多个绑定状态的多发射极波导QED系统，并提供了两光子波盒的系统构造，可以激发这些结合状态的给定叠加。作为具体示例，我们研究了带有单个和多个发射器和时间延迟的反馈的波导QED系统中的结合状态捕获。
Bound states arise in waveguide QED systems with a strong frequency-dependence of the coupling between emitters and photonic modes. While exciting such bound-states with single photon wave-packets is not possible, photon-photon interactions mediated by the emitters can be used to excite them with two-photon states. In this letter, we use scattering theory to provide upper limits on this excitation probability for a general non-Markovian waveguide QED system and show that this limit can be reached by a two-photon wave-packet with vanishing uncertainty in the total photon energy. Furthermore, we also analyze multi-emitter waveguide QED systems with multiple bound states and provide a systematic construction of two-photon wave-packets that can excite a given superposition of these bound states. As specific examples, we study bound state trapping in waveguide QED systems with single and multiple emitters and a time-delayed feedback.
