Dynamical behavior of spatially inhomogeneous relativistic λφ4 quantum field theory in the Hartree approximation -: art. no. 025015

被引:22
作者
Bettencourt, LMA
Pao, K
Sanderson, JG
机构
[1] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA
[2] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
[3] Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87545 USA
来源
PHYSICAL REVIEW D | 2002年 / 65卷 / 02期
关键词
D O I
10.1103/PhysRevD.65.025015
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the dynamics of a spatially inhomogeneous quantum lambda phi(4) field theory in 1 + 1 dimensions in the Hartree approximation. In particular, we investigate the long-time behavior of this approximation in a variety of controlled situations, both at zero and finite temperature. The observed behavior is much richer than that in the spatially homogeneous case and, unlike the latter, shows some universality at long times. Nevertheless, we show that, within a family of Gaussian spatial profiles for the mean field, the evolution fails to thermalize in a quantum canonical sense, as expected from analogous results in closely related (mean field) transport theory. We argue that this dynamical approximation is best suited as a means to study the short-time decay of spatially inhomogeneous fields and in the dynamics of coherent quasiclassical inhomogeneous configurations (e.g, topological defects) in a background of dynamical self-consistent quantum fluctuations.
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页数:13
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