Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-01-09
Phys.Rev. D69 (2004) 105018
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 6 eps figures
Scientific paper
10.1103/PhysRevD.69.105018
We derive a kinetic equation with a non-Markovian collision term which includes a memory effect, from Kadanoff-Baym equations in $\phi^4$ theory within the three-loop level for the two-particle irreducible (2PI) effective action. The memory effect is incorporated into the kinetic equation by a generalized Kadanoff-Baym ansatz.Based on the kinetic equations with and without the memory effect, we investigate an influence of this effect on decay of a single particle excitation with zero momentum in 3+1 dimensions and the spatially homogeneous case. Numerical results show that, while the time evolution of the zero mode is completely unaffected by the memory effect due to a separation of scales in the weak coupling regime, this effect leads first to faster relaxation than the case without it and then to slower relaxation as the coupling constant increases.
No associations
LandOfFree
The effect of memory on relaxation in a scalar field theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The effect of memory on relaxation in a scalar field theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of memory on relaxation in a scalar field theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-66484