AI 中文总结
研究利用边带调制在超导量子比特中设计耗散，通过脉冲控制开启按需珀塞尔衰变通道，切比雪夫传播器模型揭示其与N缝夫琅禾费衍射对应，可控制耗散谱特征，为超导电路中工程耗散塑造及开放量子系统动力学提供新方法。
AI 中文摘要
参数频率调制是超导电路中用于激活可调相互作用和实现量子门的标准工具。在此，我们通过边带调制使通量可调跨导量子比特与有损谐振器共振，从而设计其耗散，开启按需珀塞尔衰变通道。我们发现脉冲控制该通道的开启和关闭不仅降低了时间平均衰变率，还将耗散谱重组为结构化干涉图案。重复开关块的切比雪夫传播器模型再现了测量谱，并揭示出与N缝夫琅禾费衍射的紧密结构对应，每个开启窗口充当时间孔径。通过改变脉冲持续时间和占空比，我们展示了对耗散谱间距、对比度和包络的控制。这些结果确立了脉冲参数调制作为塑造超导电路中工程耗散的直接方法，并为开放量子系统动力学提供了新的控制旋钮。
英文摘要
Parametric frequency modulation is a standard tool in superconducting circuits for activating tunable interactions and implementing quantum gates. Here, we engineer dissipation in a flux-tunable transmon qubit by using sideband modulation to bring it into resonance with a lossy resonator, opening an on-demand Purcell decay channel. We find that pulsing this channel on and off does not simply lower the time-averaged decay rate; instead, it reorganizes the dissipation spectrum into a structured interference pattern. A Chebyshev-propagator model for the repeated on/off block reproduces the measured spectra and reveals a close structural correspondence to N-slit Fraunhofer diffraction, with each on-window acting as a temporal aperture. By varying the pulse duration and duty cycle, we demonstrate control over the spacing, contrast, and envelope of the dissipation spectrum. These results establish pulsed parametric modulation as a direct method for shaping engineered dissipation in superconducting circuits and provide a new control knob for open quantum system dynamics.
Comments10 pages, 4 figures
