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New ‘Physics-Inspired’ Generative AI Exceeds Expectations | Quanta Magazine

Sep 19, 2023 - quantamagazine.org
Physicists at the Massachusetts Institute of Technology (MIT) have developed a new method of producing images using artificial intelligence (AI), called the Poisson flow generative model (PFGM). The model represents data as charged particles, which combine to create an electric field. The model can create images of the same quality as those produced by diffusion-based approaches, but 10 to 20 times faster. The team has also upgraded their model to include a parameter that allows researchers to adjust the dimensionality of the system, providing greater flexibility and variability.

The researchers are also exploring other physical processes that could form the basis for new generative models. One such candidate is the Yukawa potential, which relates to the weak nuclear force and could simulate biological systems where the number of cells does not have to stay the same. The team's work has raised the possibility of other physical models for generative AI awaiting discovery.

Key takeaways:

  • Physicist Max Tegmark and his team have developed a new method of producing images called the Poisson flow generative model (PFGM), which uses the principles of charged particle distribution to create images.
  • PFGM can create images of the same quality as those produced by diffusion-based approaches and do so 10 to 20 times faster, opening the door to the possibility of other physical phenomena being harnessed to improve neural networks.
  • The team upgraded their Poisson model to PFGM++, which includes a new parameter, D, allowing researchers to adjust the dimensionality of the system, providing greater variability and flexibility.
  • The MIT researchers are also exploring other physical processes that can provide the basis for new families of generative models, with potential applications extending beyond image generation.
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