2023

Policy Representation via Diffusion Probability Model for Reinforcement Learning

Yang, Long, Huang, Zhixiong, Lei, Fenghao et al.

Understand

Popular reinforcement learning (RL) algorithms tend to produce a unimodal policy distribution, which weakens the expressiveness of complicated policy and decays the ability of exploration.

  • The diffusion probability model is powerful to learn complicated multimodal distributions, which has shown promising and potential applications to RL.
  • In this paper, we formally build a theoretical foundation of policy representation via the diffusion probability model and provide practical implementations of diffusion policy for online model-free RL.
  • Concretely, we character diffusion policy as a stochastic process, which is a new approach to representing a policy.

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