Physics of AI
Modeling and algorithm design for intelligence that meets the physical world.
phi9.space develops models and algorithms for intelligent systems that learn, reason, and act under the constraints of the physical world.
Model the system. Design the learning rule. Test the behavior.
The central problem is not simply making models larger. It is deciding what a system should represent, how it should learn, and how its behavior should be measured when the world is uncertain, dynamic, and only partly observed.
- Modeling. Build representations of dynamics, uncertainty, memory, and interaction that preserve what matters for prediction and control.
- Algorithm design. Turn those representations into learning and planning procedures that can improve from data, simulation, feedback, and experience.
- Physical evaluation. Test whether behavior remains useful under distribution shift, limited information, and real operational constraints.
Research as an engineering loop
We move between theory, implementation, and experiment. A model proposes a structure. An algorithm makes that structure operational. Evaluation reveals which assumptions survive contact with a task.
The site is a working record of that loop: research notes, implementations, failures, and methods as they become clear enough to share.
Published work
Latest research
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Toward a General Physics of Learning
A research program for laws and limits connecting finite experience and generalization to information, interaction, computation, energy, time, memory, and structure.
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Policy-based Deep RL: Lunar Landing
Pure Monte Carlo in an actor-critic setting — training a lunar lander with REINFORCE and analyzing the learned policy's decision-making.
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The First Project: Hierarchical RL for Robotic Manipulation
From sparse rewards to Gaussian-gated hierarchical policies — how we trained a 7-DOF arm to pour coffee in under 2,000 iterations.