Understand
The second functional derivative of the effective potential of pure fermionic field theories is rewritten in a factorized form which facilitates the evaluation of the renormalisation flow rate of the effective action in the Wetterich equation.
- It is applied to the Local Potential Approximation in cases, when the effective potential depends on scalar composites built from the fermions.
- The procedure is demonstrated explicitly on the example of the $N_f$-flavor Gross-Neveu model and the one-flavor chiral Nambu--Jona-Lasinio model.
Reading the bibliography…