Sequential decoder training for improved latent space dynamics identification

• URL: http://arxiv.org/abs/2510.03535v1
• Date: Fri, 03 Oct 2025 22:10:48 GMT
• Title: Sequential decoder training for improved latent space dynamics identification
• Authors: William Anderson, Seung Whan Chung, Youngsoo Choi,
• Abstract summary: We introduce mLa, a framework that improves reconstruction and prediction accuracy by sequentially learning additional decoders.<n> Applied to the 1D-1V Vlasov equation, mLa consistently outperforms standard La, achieving lower prediction errors and reduced training time.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Accurate numerical solutions of partial differential equations are essential in many scientific fields but often require computationally expensive solvers, motivating reduced-order models (ROMs). Latent Space Dynamics Identification (LaSDI) is a data-driven ROM framework that combines autoencoders with equation discovery to learn interpretable latent dynamics. However, enforcing latent dynamics during training can compromise reconstruction accuracy of the model for simulation data. We introduce multi-stage LaSDI (mLaSDI), a framework that improves reconstruction and prediction accuracy by sequentially learning additional decoders to correct residual errors from previous stages. Applied to the 1D-1V Vlasov equation, mLaSDI consistently outperforms standard LaSDI, achieving lower prediction errors and reduced training time across a wide range of architectures.

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