RESUMMATION OF PERTURBATION-SERIES IN NONEQUILIBRIUM SCALAR FIELD-THEORY

被引：44

作者：

ALTHERR, T

机构：

来源：

PHYSICS LETTERS B | 1995年 / 341卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(94)01327-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The general behaviour of perturbation series in non-equilibrium scalar field theory is analysed in some detail, with a particular emphasis on the ''pathological terms'', generated by multiple products of delta-functions. Using an intuitive regularization method, it is shown that these terms give large contributions at all orders, even when considering small deviations from equilibrium. Fortunately, these terms can also be resummed and I give the general expressions for the resummed propagators in non-equilibrium scalar field theory, regardless of the size of deviations from equilibrium.

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页码：325 / 331

页数：7

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