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arXiv · 2503.13206

Enhanced Quantum Signal Control and Sensing Under Multicolored Noise via Generalized Filter Function Framework

Zhi-Da Zhang·Yao Song·Wen-Zheng Dong·Xiu-Hao Deng
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Abstract

We introduce a generalized filter-function framework that treats noise coupling strength as a tunable control parameter, enabling target noise suppression across user-defined frequency bands. By optimizing this generalized filter function, we design band-selective control pulses that achieve $0.9999$ fidelity of single- and two-qubit gates under strong noise with diverse spectral profiles. We further extend the method to selectively enhance the signal-to-noise ratio for quantum sensing of AC signals with an enhanced precision of up to $10$ dB. The resulting control pulses are experimentally feasible, offering a practical pathway toward robust quantum operations and high-precision signal processing under spectrally complex noises.

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Zhi-Da Zhang, Yao Song, Wen-Zheng Dong, Xiu-Hao Deng. 2025-03-17. Enhanced Quantum Signal Control and Sensing Under Multicolored Noise via Generalized Filter Function Framework. https://doi.org/10.1088/2058-9565%2Fadf915

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