论文标题
可调耦合器，用于介导两级系统与从脱钩状态到超强耦合方向的波导之间的相互作用
Tunable Coupler for Mediating Interactions between a Two-Level System and a Waveguide from a Decoupled State to the Ultra-Strong Coupling Regime
论文作者
论文摘要
耦合到波导的两级系统（TLS）是光 - 物质相互作用和量子网络的基本范例。我们介绍并实验证明了一种调整TLS之间相互作用的方法，该方法是作为通量量子量乘以的实现的，以及从解耦状态到耦合强度的传输线波导，该耦合强度是TLS过渡频率的很大一部分，是超强耦合方案附近的TLS过渡频率。通过磁通量控制的耦合由标准化耦合强度$α$描述，其范围在$ 6.2 \ times10^{ - 5} $和$ 2.19 \ times10^{ - 2} $之间，并具有由设备电路模型预测的较大可实现的最大值。该系统可以在自旋 - 玻色子模型，微波光子学和相对论量子信息的动力学中进行未来的研究。
Two-level systems (TLS) coupled to waveguides are a fundamental paradigm for light-matter interactions and quantum networks. We introduce and experimentally demonstrate a method to tune the interaction between a TLS, implemented as a flux qubit, and a transmission line waveguide from a decoupled state to a coupling strength that is a significant fraction of the TLS transition frequency, near the ultra-strong coupling regime. The coupling, controlled via magnetic flux, is described by a normalized coupling strength $α$ that is measured to range between $6.2\times10^{-5}$ and $2.19\times10^{-2}$, with larger attainable maximum values predicted by a circuit model of the device. This system enables future investigations in the dynamics of the spin-boson model, microwave photonics, and relativistic quantum information.
