Effective Potential of $\lambda {\varphi }_{1+3}^4$ at Zero and Finite Temperature

Guang-jiong Ni, Su-qing Chen

The effective potential of $\lambda {\varphi }_{1+3}^4$ model with both sign of parameter $m^2$ is evaluated at T=0 by means of a simple but effective method for regularization and renormalization…