Open Access
AI-Guided Policy Learning For Hyperdimensional Sampling: Exploiting Expert Human Demonstrations From Interactive Virtual Reality Molecular Dynamics
4
Faculty of Computing and Data Science, University of Indonesia, Depok, Indonesia
4
School of Computer Science, Vietnam National University, Hanoi, Vietnam
Abstract
Introduction: Molecular Dynamics (MD) simulations are fundamentally limited by the hyperdimensional sampling problem, which hinders the observation of rare but critical molecular events such as ligand unbinding. Interactive Molecular Dynamics in Virtual Reality (iMD-VR) has emerged as a human-in-the-loop solution, leveraging human spatial intuition to efficiently navigate complex conformational landscapes. This approach generates a unique, high-fidelity dataset of expert human demonstrations.
Methods: This study explores the feasibility of leveraging these iMD-VR datasets to train autonomous Artificial Intelligence (AI) agents using Imitation Learning (IL) strategies. We implemented and evaluated both a basic Behavioral Cloning (BC) approach and a more robust Generative Adversarial Imitation Learning (GAIL) framework, augmented with strategies to mitigate the problem of covariate shift, for the task of guiding a ligand through an unbinding pathway. The state space was carefully engineered to encode the hyperdimensional molecular configuration and the action space defined by the applied force vector.
Results: The GAIL-trained policy demonstrated a significantly higher task success rate compared to the BC model, successfully mimicking the expertâs ability to apply forces that overcome high-energy barriers. Autonomous agent trajectories showed a high fidelity to the expertâs path, successfully exploring pharmacologically relevant conformational space and achieving up to a $65\%$ reduction in the effective energy barrier in tested systems.
Discussion: The findings confirm that IL, particularly advanced methods like GAIL, can effectively translate expert human intuition from a VR environment into robust, autonomous policies for sampling hyperdimensional molecular systems. This AI-guided approach represents a transformative path toward the democratization and acceleration of molecular discovery, with profound implications for computer-aided drug design and materials science by autonomously enabling the exploration of rare-event pathways.
Keywords
Artificial Intelligence,
Molecular Dynamics,
Virtual Reality,
Imitation Learning
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