论文标题
非马克维亚光子晶格中的振荡绑定状态
Oscillating bound states in non-Markovian photonic lattices
论文作者
论文摘要
众所周知，连续体（BIC）中两个结合状态的叠加导致了振荡结合状态的现象，其中连续模式介导的激发持续振荡。我们在1D光子晶格中对振荡BIC进行精确计算，该计算在多个点耦合到“巨型原子”。由于存在有限的能量带促进带边缘效应的有限能带，我们的工作与以前关于连续波导系统中振荡BIC的提案明显不同。特别是，我们表明能量带之外的结合状态对振荡的BIC现象有害，并且可以通过增加耦合点的数量或每个耦合点之间的分离来抑制。至关重要的是，非马克维亚性对于振荡BIC的存在是必要的，而振荡幅度随着巨型原子相互作用的特征延迟时间而增加。我们还提出了BIC子空间中新型初始化方案。我们的工作可以在当前的光子波导阵列平台上实验实施，并在利用储层工程方面开辟了新的潜在客户，以存储光子晶格中的量子信息。
It is known that the superposition of two bound states in the continuum (BIC) leads to the phenomenon of an oscillating bound state, where excitations mediated by the continuum modes oscillate persistently. We perform exact calculations for the oscillating BICs in a 1D photonic lattice coupled to a "giant atom" at multiple points. Our work is significantly distinct from previous proposals of oscillating BICs in continuous waveguide systems due to the presence of a finite energy band contributing band-edge effects. In particular, we show that the bound states outside the energy band are detrimental to the oscillating BIC phenomenon, and can be suppressed by increasing either the number of coupling points or the separation between each coupling point. Crucially, non-Markovianity is necessary for the existence of oscillating BIC, and the oscillation amplitude increases with the characteristic delay time of the giant atom interactions. We also propose a novel initialization scheme in the BIC subspace. Our work be experimentally implemented on current photonic waveguide array platforms and opens up new prospects in utilizing reservoir engineering for the storage of quantum information in photonic lattices.
