String theorists believe that elementary particles can be described by one dimensional string-like objects that propagate in certain geometries. An appropriate mathematical treatment combines the study of quantum field theory and geometry. Whether or not one believes in the physical (or even mathematical) reality of string theory as a whole, the idea to use one-dimensional test particles to investigate the properties of interesting geometries allows far reaching insights- both in quantum field theory and in geometry.

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Last updated: 27 Feb 2024