Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-07-06
Nucl.Phys.A849:165-181,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 9 figures
Scientific paper
10.1016/j.nuclphysa.2010.10.007
We apply to the calculation of the pressure of a hot scalar field theory a method that has been recently developed to solve the Non-Perturbative Renormalization Group. This method yields an accurate determination of the momentum dependence of n-point functions over the entire momentum range, from the low momentum, possibly critical, region up to the perturbative, high momentum region. It has therefore the potential to account well for the contributions of modes of all wavelengths to the thermodynamical functions, as well as for the effects of the mixing of quasiparticles with multi-particle states. We compare the thermodynamical functions obtained with this method to those of the so-called Local Potential Approximation, and we find extremely small corrections. This result points to the robustness of the quasiparticle picture in this system. It also demonstrates the stability of the overall approximation scheme, and this up to the largest values of the coupling constant that can be used in a scalar theory in 3+1 dimensions. This is in sharp contrast to perturbation theory which shows no sign of convergence, up to the highest orders that have been recently calculated.
Blaizot Jean Paul
Ipp Andreas
Wschebor Nicolas
No associations
LandOfFree
Calculation of the pressure of a hot scalar theory within the Non-Perturbative Renormalization Group 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 Calculation of the pressure of a hot scalar theory within the Non-Perturbative Renormalization Group, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calculation of the pressure of a hot scalar theory within the Non-Perturbative Renormalization Group will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-344515