15 citations · 16 across the 5 of their papers we have counts for
5 papers
Non-linear sigma models on constant curvature target manifolds: a functional renormalization group approach
Alexander N. Efremov, Adam Rançon
We study non-linear sigma models on target manifolds with constant (positive or negative) curvature using the functional renormalization group and the background field method. We p…
Vacuum polarization in Uranium
Alexander Efremov
We formulate the Hartree-Fock method using a functional integral approach. Then we consider a nonperturbative component of the vacuum polarization. For the Dirac-Coulomb operator t…
Stochastic quantization of massive fermions
A. N. Efremov
We consider a general solution of the Langevin equation describing massive fermions to an appropriate boundary problem. Assuming existence of such solution we show that its correla…
The gluon condensate in an effective SU(2) Yang-Mills theory
A. N. Efremov
We make progress towards a derivation of a low energy effective theory for SU(2) Yang-Mills theory. This low energy action is computed to 1-loop using the renormalization group tec…
Renormalization of SU(2) Yang-Mills theory with Flow Equations
Alexander N. Efremov, Riccardo Guida, Christoph Kopper
We give a proof of perturbative renormalizability of SU(2) Yang--Mills theory in four-dimensional Euclidean space which is based on the Flow Equations of the renormalization group.…