Speaker
Prof.
Margaret Carrington
(Brandon University)
Description
We use the functional renormalization group to formulate the renormalization of the nPI effective action. The resulting set of coupled integro-differential equations can be solved using a numerical lattice method. The major numerical obstacle is the size of the phase space, which can be reduced by efficiently exploiting the symmetries of the n-point functions. The renormalization group method does not require counter-terms and can be used beyond the level of the 2PI effective action to obtain next-to-leading order contributions to physical observables like viscosity. We present some numerical results for the non-perturbative 2-point and 4-point functions from the 2PI and 4PI effective actions.
Primary author
Prof.
Margaret Carrington
(Brandon University)
