We study how single-qubit dispersive readout works alongside two-qubit coupling. To make calculations analytically tractable, we use a simplified model which retains core characteristics of but is discretized compared to dispersive homodyne detection. We show how the measurement speed and power determine what information about the qubit(s) is accessed. Specifically we find the basis the measurement is closest to projecting onto. Compared to the basis in which gates are applied, this measurement basis is modified by the presence of photons in the readout resonator.

中文翻译：

---

在多量子位芯片上执行量子位测量时要测量的内容

我们研究单量子位色散读出与两量子位耦合一起工作的方式。为了使计算在分析上易于处理，我们使用简化的模型，该模型保留的核心特征，但与色散零差检测相比是离散的。我们展示了测量速度和功率如何确定访问有关qubit的哪些信息。具体来说，我们找到了最接近投影的基础。与施加门的基础相比，此测量基础因读出谐振器中光子的存在而被修改。