ON THE CREATION OF SCALAR PARTICLES IN A FLAT ROBERTSON-WALKER SPACETIME

被引：8

作者：

Haouat, S. ^{[1
]}

Chekireb, R. ^{[1
]}

机构：

[1] Univ Jijel, Dept Phys, LPTh, Ouled Aissa 18000, Jijel, Algeria

来源：

MODERN PHYSICS LETTERS A | 2011年 / 26卷 / 35期

关键词：

Particle creation; Robertson-Walker spacetime; Bogoliubov transformation; QUANTIZED-FIELDS; DARK-MATTER; RENORMALIZATION; REGULARIZATION; UNIVERSE;

D O I：

10.1142/S0217732311037017

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The problem of particle creation from vacuum in a flat Robertson-Walker spacetime is studied. Two sets of exact solutions for the Klein-Gordon equation are given when the scale factor is a(2)(eta) = a + b tanh(lambda eta) + c tanh(2)(lambda eta). Then the canonical method based on Bogoliubov transformation is applied to calculate the pair creation probability and the density number of created particles. Some particular cosmological models such as radiation dominated universe and Milne universe are discussed. For both cases the vacuum to vacuum transition probability is calculated and the imaginary part of the effective action is extracted.

引用

页码：2639 / 2651

页数：13

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