@article{oai:tsukuba.repo.nii.ac.jp:00027884,
 author = {八田, 佳孝 and Hatta, Yoshitaka and Nishiyama, Akihiro},
 issue = {7},
 journal = {Physical review D},
 month = {Oct},
 note = {Motivated by the problem of thermalization in heavy ion collisions, we present numerical simulations of the nonequilibrium evolution of the O(N) model in 1+2 dimensions with longitudinal expansion and in the presence of a background field. We work in the next-to-leading-order approximation of the 1/N expansion and consider both the strong and weak coupling cases. Special emphasis is put on the difference between the two-particle irreducible formalism and the classical statistical approach. In the two-particle irreducible case at strong coupling, we find some evidence of the Bose-Einstein (exponential) distribution in the expanding system.},
 title = {Nonequilibrium two-particle irreducible evolution of the O(N) model with longitudinal expansion},
 volume = {86},
 year = {2012}
}