33 citations · 67 across the 7 of their papers we have counts for
7 papers
Chiral and U(1) axial symmetry restoration in linear sigma models with two quark flavors
Stefan Michalski
We study the restoration of chiral symmetry in linear sigma models with two quark flavors. The models taken into consideration have a U(2)_L x U(2)_R and an O(4) internal symmetry.…
Scalar O(N) Model at Finite Temperature -- 2PI Effective Potential in Different Approximations
Jurgen Baacke, Stefan Michalski
We calculate the two-particle irreducible (2PI) effective potential of the O(N) linear sigma model in 1+1 dimensions. The approximations we use are the next-to-leading order of a 1…
The 2PI finite temperature effective potential of the O(N) linear sigma model in 1+1 dimensions, at next-to-leading order in 1/N
Jurgen Baacke, Stefan Michalski
We study the O(N) linear sigma model in 1+1 dimensions. We use the 2PI formalism of Cornwall, Jackiw and Tomboulis in order to evaluate the effective potential at finite temperatur…
O(N) linear sigma model beyond the Hartree approximation at finite temperature
J. Baacke, Stefan Michalski
We study the O(N) linear sigma model with spontaneous symmetry breaking at finite temperature in the framework of the two-particle point-irreducible (2PPI) effective action. We go…
Nonequilibrium dynamics of the O(N) linear sigma model
Stefan Michalski
We investigate the out-of-equilibrium evolution of a classical background field and its quantum fluctuations in the scalar O(N) model with spontaneous symmetry breaking. We conside…
The O(N) linear sigma model at finite temperature beyond the Hartree approximation
J. Baacke, S. Michalski
We study the O(N) linear sigma model with spontaneous symmetry breaking, using a Hartree-like ansatz with a classical field and variational masses. We go beyond the Hartree approxi…