用物理描述符作为残差门控,提升波动力学预测精度与相位一致性。
Multi-Head Residual-Gated DeepONet for Coherent Nonlinear Wave Dynamics

- 设计双路径结构:状态路径+物理描述符残差门控路径
- 在非线性保守与耗散波动力学上误差更低,相位保持更稳定
- 适合需高保真物理量预测的复杂波动系统建模
相干非线性波动力学常由初始状态的少量物理有意义描述符决定。传统神经算子将输入输出映射视为黑箱高维回归,未显式利用这种结构化物理背景。常见特征融合策略依赖隐藏空间中的直接拼接或FiLM式仿射调制。本文提出新范式:类比量子力学中态演化与可观测量的互补作用——波场通过标准DeepONet状态路径学习,而紧凑物理描述符走并行条件路径,并作为残差调制因子作用于状态预测。基于此,我们构建多头残差门控DeepONet(MH-RG),结合预分支残差调制器、分支残差门控和主干残差门控,辅以低秩多头机制,在不显著增加参数量的前提下捕捉多种互补条件响应模式。在典型基准测试中,包括高度非线性保守波动力学与耗散束缚动力学,性能优于特征增强基线模型,误差更低,同时更好保持相位一致性和关键物理量保真度。
原文摘要 · Abstract (English)
Coherent nonlinear wave dynamics are often strongly shaped by a compact set of physically meaningful descriptors of the initial state. Traditional neural operators typically treat the input-output mapping as a largely black-box high-dimensional regression problem, without explicitly exploiting this structured physical context. Common feature-integration strategies usually rely on direct concatenation or FiLM-style affine modulation in hidden latent spaces. Here we introduce a different paradigm, loosely inspired by the complementary roles of state evolution and physically meaningful observables in quantum mechanics: the wave field is learned through a standard DeepONet state pathway, while compact physical descriptors follow a parallel conditioning pathway and act as residual modulation factors on the state prediction. Based on this idea, we develop a Multi-Head Residual-Gated DeepONet (MH-RG), which combines a pre-branch residual modulator, a branch residual gate, and a trunk residual gate with a low-rank multi-head mechanism to capture multiple complementary conditioned response patterns without prohibitive parameter growth. We evaluate the framework on representative benchmarks including highly nonlinear conservative wave dynamics and dissipative trapped dynamics and further perform detailed mechanistic analyses of the learned multi-head gating behavior. Compared with feature-augmented baselines, MH-RG DeepONet achieves consistently lower error while better preserving phase coherence and the fidelity of physically relevant dynamical quantities.
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