论文标题
驱动拓扑量子电路中的电动力
Electromotive force in driven topological quantum circuits
论文作者
论文摘要
超导量子电路的时间依赖性控制是构建可扩展量子硬件的先决条件。这些电路的量子描述由于随时间变化的磁场引起的电动力（EMF）而变得复杂。在这里，我们研究了EMF如何修饰约瑟夫森效应的分数。我们表明，随时间变化的通量引入了一个新的术语，该术语取决于电路和施加的磁场的几何形状。可以通过闭环和开路几何形状中的电流和电荷测量进行探测。我们的结果完善了当前对如何正确描述拓扑量子电路的时间依赖性控制的理解。
Time-dependent control of superconducting quantum circuits is a prerequisite for building scalable quantum hardware. The quantum description of these circuits is complicated due to the electromotive force (emf) induced by time-varying magnetic fields. Here, we examine how the emf modifies the fractional Josephson effect. We show that a time-varying flux introduces a new term that depends on the geometry of both the circuit and the applied magnetic field. This term can be probed via current and charge measurements in closed-loop and open-circuit geometries. Our results refine the current understanding of how to properly describe time-dependent control of topological quantum circuits.
