Gauge Theory on a Lattice
نویسنده
چکیده
One approach to field theory, in particular to aspects that are not well treated in perturbation theory, is to approximate the field defined on a spacetime continuum with a lattice field theory, defined on a lattice of space-time points. There has been a great deal of cross-fertilization from considering renormalization from the continuum high-energy physics point of view and from the condensed matter, Wilsonian, viewpoint, in which the field theory only makes sense down to some small distance scale anyway. But we are going to consider field theory on a lattice for a different reason — because it helps to clarify the fundamental idea of gauge fields.
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