标题： 超导量子比特中微波驱动的准粒子生成理论 显示英文标题

标题： Theory of Quasiparticle Generation by Microwave Drives in Superconducting Qubits

摘要： 微波驱动通常被用于控制超导量子电路，从而实现量子比特门操作、读出和参数相互作用。由于驱动频率通常比（两倍）超导能隙小一个数量级，因此一般认为这种驱动不会干扰BCS基态。然而，足够强的驱动可以激活多光子对破裂过程，从而产生准粒子并导致量子比特错误。在这项工作中，我们提出了一个理论框架来计算由电荷耦合和磁通耦合微波驱动引起的多光子辅助对破裂跃迁的速率。通过说明性实例，我们展示了驱动诱导的准粒子生成可能会影响新型高频色散读出架构，以及在强驱动条件下运行的弗洛凯工程超导电路。 显示英文摘要

摘要： Microwave drives are commonly employed to control superconducting quantum circuits, enabling qubit gates, readout, and parametric interactions. As the drive frequencies are typically an order of magnitude smaller than (twice) the superconducting gap, it is generally assumed that such drives do not disturb the BCS ground state. However, sufficiently strong drives can activate multi-photon pair-breaking processes that generate quasiparticles and result in qubit errors. In this work, we present a theoretical framework for calculating the rates of multi-photon-assisted pair-breaking transitions induced by both charge- and flux-coupled microwave drives. Through illustrative examples, we show that drive-induced QP generation may impact novel high-frequency dispersive readout architectures, as well as Floquet-engineered superconducting circuits operating under strong driving conditions.