Closed-Form Solutions of Zero Dimensional ${\varphi }^4$-Field Theory Using Bessel Functions: A Non-Perturbative Approach

Ranjiva M. Munasinghe

The integral ${\int }_{-\infty }^{\infty }{e}^{-x^2-g{x}^4}dx$ is used as an introductory learning tool in the study of Quantum Field Theory and path integrals. Typically it is analy…