标题： 超导电路中用于被动抑制普尔塞效应衰减的本征多模干涉 显示英文标题

标题： Intrinsic Multi-Mode Interference for Passive Suppression of Purcell Decay in Superconducting Circuits

摘要： 由于辐射衰减引起的退相干在扩展超导量子处理器中仍然是一个重要考虑因素。 我们引入了一种被动的、基于干涉的方法，仅利用超导电路固有的多模式结构化环境来抑制辐射衰减。 通过考虑器件内部完整的电磁模-模耦合，我们推导出使破坏性干涉成为可能的解析条件。 这些条件是通过引入受控的几何不对称性来实现的——例如对transmon电容的局部扰动——这增加了模态混合并激活了多个衰减路径之间的干涉。 我们使用微扰理论、全波电磁仿真以及对具有改进退相干时间的对称性破缺transmon量子比特的实验测量来验证这种方法。 显示英文摘要

摘要： Decoherence due to radiative decay remains an important consideration in scaling superconducting quantum processors. We introduce a passive, interference-based methodology for suppressing radiative decay using only the intrinsic multi-mode structured environment of superconducting circuits. By taking into account the full electromagnetic mode-mode couplings within the device, we derive analytic conditions that enable destructive interference. These conditions are realized by introducing controlled geometric asymmetries -- such as localized perturbations to the transmon capacitor -- which increase mode hybridization and activate interference between multiple decay pathways. We validate this methodology using perturbation theory, full-wave electromagnetic simulations, and experimental measurements of a symmetry-broken transmon qubit with improved coherence times.