Feedback Archives - IEEE Transactions on Quantum Engineering

Dissipative Feedback and Hybrid Lyapunov-Reinforcement Learning Control for NV-Center Quantum Sensing

August 17, 2026Yuxuan Zhao, Xiaofeng Jiang, Tianxiang Xiong, Sen Kuang, Jian YangEarly Access, Open AccessDynamics, Feedback, Learning (artificial intelligence), Modeling, Optimization, Quantum sensing, Reinforcement learning, Sensitivity, Timing, Training

Abstract: Practical NV-center magnetometry requires both accurate modeling of open quantum dynamics and robust control under environmental drift. However, commonly used perturbative descriptions inadequately capture dissipative processes, while existing control strategies remain individually limited: open-loop protocols cannot adapt to unknown frequency variations, Lyapunov feedback typically converges only to a neighborhood of the optimal sensing state, […]

Automated Active-Visibility-Control Loop for Stabilized DPS-QKD Decoding under Dynamic Wavelength Drift

July 10, 2026Kuan-Wei Hu, Chih-Hsien Cheng, Atsushi Matsumoto, Kouichi Akahane, Gong-Ru LinEarly Access, Open AccessAlgorithms, Automatic voltage control, Codes, Current, Decoding, Feedback, Feedback control, Single-photon avalanche diodes, Temperature, Timing

Abstract: Automated and instantaneous stabilizing control of the quantum key decoder is the mandatory procedure, which guarantees real-time and high-speed differential-phase-shift (DPS) quantum key distribution (QKD) at low erroneous rate, and ensures the delay-line interferometric (DLI) decoding of the weak-coherent-pulse quantum bit-stream at a qualified and constant visibility. As the QKD system often suffers from […]

Defending QKD Networks: Routing and Wavelength Assignment to Mitigate Physical-Layer Attacks

April 15, 2026Mengyao Li, Qiaolun Zhang, Zheng Zhang, Zongshuai Yang, Stefano Bregni, Alberto Gatto, Vicente Martin, Raouf Boutaba, Massimo TornatoreEarly Access, Open AccessAntennas, Central Processing Unit, Circuits, Communication systems, Electronic warfare, Feedback, Feeds, Jamming, Optical fibers, Optical waveguides

Abstract: Quantum key distribution (QKD) supports secret key exchange to enable data exchange with guaranteed security but remains vulnerable to key exchange interruption caused by physical-layer threats, such as high-power jamming attacks. In particular, in a fiber-based QKD network equipped with optical switching capabilities, a high-power jamming signal injected into a single link can be […]

Cut&Shoot: Distributed Execution of Quantum Circuit Fragments

April 8, 2026Giuseppe Bisicchia, Alessandro Bocci, Jose Garcia-Alonso, Juan M. Murillo, Antonio BrogiQuantum ComputingCentral Processing Unit, Circuits, Circuits and systems, Feedback, Filtering, Filters, Frequency modulation, Quantum circuit, Radio broadcasting, Very large scale integration

Abstract: Quantum computing is progressing at a rapid pace, although still constrained by the limitations of noisy intermediate-scale quantum (NISQ) devices, such as restricted qubit counts and high susceptibility to noise. To address these constraints, researchers have begun adapting classical software engineering principles to the quantum realm, giving rise to the field of quantum software […]