Schwinger-Dyson approximants

Bartomeu Fiol, Elena Gijon, Unai Lejarza Alonso

We revisit the solution to the Schwinger-Dyson equations in the simple case of the 0-dimensional $\frac{1}{2}{m}^2{\varphi }^2+\frac{\lambda }{4}{\varphi }^4$ theory with $m^2>0$ and $\lambda \ge 0$. We argue tha…