17 citations · 24 across the 3 of their papers we have counts for
4 papers · 1 filter
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…
Out-of-equilibrium evolution of quantum fields in the hybrid model with quantum back reaction
Jurgen Baacke, Andreas Heinen
The hybrid model with a scalar "inflaton" field coupled to a "Higgs" field with a broken symmetry potential is one of the promising models for inflation and (p)reheating after infl…
Nonequilibrium evolution of Phi**4 theory in 1+1 dimensions in the 2PPI formalism
Jurgen Baacke, Andreas Heinen
We consider the out-of-equilibrium evolution of a classical condensate field and its quantum fluctuations for a Phi**4 model in 1+1 dimensions with a symmetric and a double well po…
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…