中国物理B ›› 2026, Vol. 35 ›› Issue (6): 60201-060201.doi: 10.1088/1674-1056/ae5786

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Synergistic delay and strength tuning for logical operations in a chaotic neuron

Ying Xu(徐莹)†   

  1. School of Mathematics and Statistics, Shandong Normal University, Ji'nan 250014, China
  • 收稿日期:2026-02-04 修回日期:2026-03-19 接受日期:2026-03-26 发布日期:2026-06-15
  • 通讯作者: Ying Xu E-mail:uryysunshine@163.com
  • 基金资助:
    Project supported by the Key R&D Program of Shandong Province, China (Grant No. 2025CXPT087) and the National Natural Science Foundation of China (Grant No. 12402061).

Synergistic delay and strength tuning for logical operations in a chaotic neuron

Ying Xu(徐莹)†   

  1. School of Mathematics and Statistics, Shandong Normal University, Ji'nan 250014, China
  • Received:2026-02-04 Revised:2026-03-19 Accepted:2026-03-26 Published:2026-06-15
  • Contact: Ying Xu E-mail:uryysunshine@163.com
  • Supported by:
    Project supported by the Key R&D Program of Shandong Province, China (Grant No. 2025CXPT087) and the National Natural Science Foundation of China (Grant No. 12402061).

摘要: An improved FitzHugh-Nagumo neuron model is proposed, incorporating electromagnetic induction via a flux-controlled memristor and dual autaptic feedback with tunable strengths and delays. This brain-inspired unit can reliably perform AND and OR logic operations under chaotic driving, serving as a tunable nonlinear computing element. Systematic numerical analysis reveals that the synergistic interplay between autaptic delays and strengths plays a key role in achieving optimal logical stochastic resonance. Specifically, the system achieves near-perfect success rates within specific parameter regions, where a compensatory effect enables delay asymmetry to balance synaptic strength mismatch. Furthermore, at lower coupling strengths, a multiple logical resonance phenomenon is observed, in which the success probability exhibits multiple peaks as a function of synaptic delay. This work not only elucidates the dynamical mechanism underlying reliable neuronal logic operation but also provides a co-design principle for tuning neuromorphic circuits, with potential implications for low-power, high-flexibility computing hardware.

关键词: FitzHugh-Nagumo neuron model, memristor, multi-scale autapse, logical resonance, time delay

Abstract: An improved FitzHugh-Nagumo neuron model is proposed, incorporating electromagnetic induction via a flux-controlled memristor and dual autaptic feedback with tunable strengths and delays. This brain-inspired unit can reliably perform AND and OR logic operations under chaotic driving, serving as a tunable nonlinear computing element. Systematic numerical analysis reveals that the synergistic interplay between autaptic delays and strengths plays a key role in achieving optimal logical stochastic resonance. Specifically, the system achieves near-perfect success rates within specific parameter regions, where a compensatory effect enables delay asymmetry to balance synaptic strength mismatch. Furthermore, at lower coupling strengths, a multiple logical resonance phenomenon is observed, in which the success probability exhibits multiple peaks as a function of synaptic delay. This work not only elucidates the dynamical mechanism underlying reliable neuronal logic operation but also provides a co-design principle for tuning neuromorphic circuits, with potential implications for low-power, high-flexibility computing hardware.

Key words: FitzHugh-Nagumo neuron model, memristor, multi-scale autapse, logical resonance, time delay

中图分类号:  (Ordinary differential equations)

  • 02.30.Hq
02.30.Oz (Bifurcation theory) 05.45.-a (Nonlinear dynamics and chaos) 05.40.Ca (Noise)