HIGH-FREQUENCY STABILIZATION OF SUPERCONDUCTING FULL-WAVE BRIDGE RECTIFIERS USING NOISE SPECTROSCOPY AND COHERENT ERROR MITIGATION

Superconducting full-wave bridge rectifiers are pivotal components in cryogenic quantum computing and RF cryoelectronic due to their ultra-low power dissipation and high-speed operation. However, their performance is significantly constrained at high frequencies by Joule heating and thermal noise, leading to resistive hotspot formation and a reduction in critical current asymmetry. This paper proposes an integrated approach that combines noise spectroscopy and coherent error mitigation techniques to overcome these limitations. Noise spectroscopy is employed to identify and characterize dominant thermal noise sources, such as vortex motion, quasiparticle generation, and Johnson–Nyquist noise, enabling precise modeling of the device’s thermal profile. Coherent error mitigation—comprising dynamic field tuning, pulse shaping, and feedback cooling—provides adaptive real-time stabilization to suppress thermal runaway and preserve superconductivity under high-frequency excitation. Simulation and analysis indicate that this methodology can potentially extend stable rectification performance up to 50 MHz, significantly enhancing the operational bandwidth of NbN-based rectifiers for quantum control systems.