论文标题
挫折引起的异常运输和波导QED中的强光子衰变
Frustration-induced anomalous transport and strong photon decay in waveguide QED
论文作者
论文摘要
我们研究了一个在一维环境中的光子的传播，该环境由两个非相互作用的光子组成，这些光子可令人沮丧地耦合到单个Spin-1/2。 Ultrastrong沮丧的耦合导致光和物质自由度的极端混合，从而导致旋转崩解和“穿着旋转”或Polaron的崩溃，即描述。使用数值和分析方法的组合，我们表明在有效自旋频率下弹性响应越来越弱，而是在较高能量下显示出越来越强的宽带响应。我们还表明，光子可以腐烂成较小能量的多个光子。这些非弹性过程的总概率可能与总弹性散射率或总散射速率的一半一样大，这是尽可能大的。沮丧的自旋诱导强烈的各向异性光子光子相互作用，这些相互作用由种间相互作用主导。我们的结果与最新的电路和空腔量子电动力学实验有关。
We study the propagation of photons in a one-dimensional environment consisting of two non-interacting species of photons frustratingly coupled to a single spin-1/2. The ultrastrong frustrated coupling leads to an extreme mixing of the light and matter degrees of freedom, resulting in the disintegration of the spin and a breakdown of the "dressed-spin", or polaron, description. Using a combination of numerical and analytical methods, we show that the elastic response becomes increasingly weak at the effective spin frequency, showing instead an increasingly strong and broadband response at higher energies. We also show that the photons can decay into multiple photons of smaller energies. The total probability of these inelastic processes can be as large as the total elastic scattering rate, or half of the total scattering rate, which is as large as it can be. The frustrated spin induces strong anisotropic photon-photon interactions that are dominated by inter-species interactions. Our results are relevant to state-of-the-art circuit and cavity quantum electrodynamics experiments.
