The advantage of Pauli-Villars regularization in quantum field theory quantized on the light front is explained. Simple examples of scalar λϕ4 field theory and Yukawa-type model are used. We give also an example of nonperturbative calculation in the theory with Pauli-Villars fields, using for that a model of anharmonic oscillator modified by inclusion of ghost variables playing the role similar to Pauli-Villars fields.
Malyshev, M. Y., Paston, S. A., Prokhvatilov, E. V., Zubov, R. A., & Franke, V. A. (2016). Pauli-Villars Regularization in Nonperturbative Hamiltonian Approach on the Light Front. AIP Conference Proceedings, 1701, 100012. https://doi.org/10.1063/1.4938721