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Department of Physics and Astronomy
University of Mississippi

Events

Event Information:

  • Tue
    27
    Mar
    2018

    Colloquium: Data Science and Quantum Gravity

    4:00 pmLewis Hall 101

    David Meyer
    Department of Mathematics
    University of California — San Diego

    Data Science and Quantum Gravity

    Data, even “big data”, is finite, and thus discrete. A common goal is to describe them as the outcome of a random process specified by a small number of parameters; doing so at least compresses the data, and at best explicates the process by which they were generated. Some important approaches include low-rank matrix factorization and multi-dimensional scaling, both of which reveal a geometry behind the data. Such interplay between the discrete and the continuous is familiar in theoretical and computational physics, from the definition and regularization of path integrals to numerical methods for fluid dynamics. In this talk I'll explain how recent data science results in non-metric multidimensional scaling provide a new perspective on the Hawking-Malament theorem that is the foundation of the causal set program for quantum gravity. I'll describe a new algorithm for embedding causal sets in Lorentzian manifolds motivated by this perspective. And I'll end with some speculations about possible quantum dynamics for causal sets. Familiarity with the causal set program for quantum gravity will not be assumed.