University of Cambridge > Talks.cam > Machine learning in Physics, Chemistry and Materials discussion group (MLDG) > Unsupervised Machine Learning and Band Topology

Unsupervised Machine Learning and Band Topology

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The study of topological band structures is an active area of research in condensed matter physics and beyond. In this talk I present some recent progress in this field upon combining them with developments in machine learning. Specifically, I introduce an unsupervised machine learning approach that searches for and retrieves paths of adiabatic deformations between Hamiltonians, thereby clustering them according to their topological properties. The algorithm is general, as it does not rely on a specific parametrization of the Hamiltonian and is readily applicable to any symmetry class. We demonstrate the approach using several different models in both one and two spatial dimensions and for different symmetry classes with and without crystalline symmetries. Accordingly, it is also shown how trivial and topological phases can be diagnosed upon comparing with a generally designated set of trivial atomic insulators.

This talk is part of the Machine learning in Physics, Chemistry and Materials discussion group (MLDG) series.

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