We discuss a simple system which has a central charge in its Poincare algebra. We show that this system is exactly solvable after quantization and that the algebra holds without anomalies.
Computation of the Central Charge for the Leading Order of the N=2 Super-Yang-Mills Effective Action
Fractal index, central charge and fractons
Effect of quantum fluctuations on topological excitations and central charge in supersymmetric theories
