论文标题
超导弱环节中的动态均衡选择
Dynamical parity selection in superconducting weak links
论文作者
论文摘要
多余的准粒子在从量子器到量子传感器的超导量子设备中起着至关重要的作用。在这项工作中，我们分析了它们与几个Andreev子隙状态的相位偏置有限长度弱环节的动力学，其中与微波炉谐振器的耦合允许奇偶校验状态（偶数/奇数）读数。我们的理论表明，在给定平价部门中，几乎完美的动态极化是可以通过在相反的平价部门匹配过渡的微波脉冲来实现的。我们的结果定性地解释了有关混合半导体的纳米管约瑟夫森连接的最新实验的关键特征，并提供了有效控制安德里弗夫量子的平价状态的理论指南。
Excess quasiparticles play a crucial role in superconducting quantum devices ranging from qubits to quantum sensors. In this work we analyze their dynamics for phase-biased finite-length weak links with several Andreev subgap states, where the coupling to a microwave resonator allows for parity state (even/odd) readout. Our theory shows that almost perfect dynamical polarization in a given parity sector is achievable by applying a microwave pulse matching a transition in the opposite parity sector. Our results qualitatively explain key features of recent experiments on hybrid semiconducting nanowire Josephson junctions and provide theoretical guidelines for efficiently controlling the parity state of Andreev qubits.
