论文标题
在光泵下，在强耦合的三Q量波导系统中探测着装状态和量子非线性
Probing dressed states and quantum nonlinearities in a strongly coupled three-qubit waveguide system under optical pumping
论文作者
论文摘要
当侧粒子充当原子镜时，我们在存在光学泵的情况下研究了三量的波导系统，以强烈的轻度耦合状态表现出来。这些Qubits被建模为Fermionic两级系统，在其中我们解释了重要的饱和效应和量子非线性。光学泵送该系统可显示出丰富的衣服状态，可以在发射的频谱中看到，并且我们使用中等依赖的主方程模型在Markovian极限中显示了两种不同的理论解决方案，并且在不调用任何Markov近似值的情况下使用矩阵产品状态。我们证明了如何通过改变镜子的相对衰减速率及其空间分离来获得丰富的非线性光谱，并显示使用马尔可夫主方程的局限性。我们的模型允许人们直接建模巨型原子现象，包括重要的迟钝效应和多光子非线性。我们还展示了激发的三个Qubit系统在强大的耦合方面如何与Jaynes-Cummings模型显着偏离非线性制度。
We study a three-qubit waveguide system in the presence of optical pumping, when the side qubits act as atomlike mirrors, manifesting in a strong light-matter coupling regime. The qubits are modelled as Fermionic two-level systems, where we account for important saturation effects and quantum nonlinearities. Optically pumping this system is shown to lead to a rich manifold of dressed states that can be seen in the emitted spectrum, and we show two different theoretical solutions using a medium-dependent master equation model in the Markovian limit, as well as using matrix product states without invoking any Markov approximations. We demonstrate how a rich nonlinear spectrum is obtained by varying the relative decay rates of the mirror qubits as well as their spatial separation, and show the limitations of using a Markovian master equation. Our model allows one to directly model giant-atom phenomena, including important retardation effects and multi-photon nonlinearities. We also show how the excited three qubit system, in a strong coupling regime, deviates significantly from a Jaynes-Cummings model when entering the nonlinear regime.
