Exact minimal-action configurations for each topological charge sector are written down for 2D U(2) lattice gauge theory, and a tower of constant-action configurations is found for U(N_c).
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Topology in 2D non-Abelian Lattice Gauge Theories
Exact minimal-action configurations for each topological charge sector are written down for 2D U(2) lattice gauge theory, and a tower of constant-action configurations is found for U(N_c).