Action Value Function

Action-value functions, which estimate the expected cumulative reward for taking a specific action in a given state, are central to reinforcement learning (RL). Current research focuses on improving the efficiency and accuracy of estimating these functions, particularly through advancements in model architectures like Q-networks and their variations (e.g., iterated Q-networks, residual Q-networks), value decomposition methods for multi-agent systems, and the incorporation of world models. These improvements are crucial for scaling RL to complex, high-dimensional problems and enabling its application in diverse fields such as robotics, healthcare, and marketing, where interpretability and sample efficiency are paramount.

Papers