Matter creation in a nonsingular bouncing cosmology

被引:112
作者
Quintin, Jerome [1 ]
Cai, Yi-Fu [1 ]
Brandenberger, Robert H. [1 ]
机构
[1] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
PARTICLE CREATION; QUANTIZED-FIELDS; TENSOR;
D O I
10.1103/PhysRevD.90.063507
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We examine reheating in the two-field matter bounce cosmology. In this model, the Universe evolves from a matter-dominated phase of contraction to an Ekpyrotic phase of contraction before the nonsingular bounce. The Ekpyrotic phase frees the model from unwanted anisotropies, but leaves the Universe cold and empty of particles after the bounce. For this reason, we explore two particle production mechanisms which take place during the course of the cosmological evolution: Parker particle production where the matter field couples only to gravity and particle creation via interactions between the matter field and the bounce field. Although we show that both mechanisms can produce particles in this model, we find that Parker particle production is sufficient to reheat the Universe to high temperatures. Thus there is a priori no need to add an interaction term to the Lagrangian of the model. Still, particle creation via interactions can contribute to the formation of matter and radiation, but only if the coupling between the fields is tuned to be large.
引用
收藏
页数:14
相关论文
共 59 条
[1]   PARTICLE-PRODUCTION IN THE NEW INFLATIONARY COSMOLOGY [J].
ABBOTT, LF ;
FARHI, E ;
WISE, MB .
PHYSICS LETTERS B, 1982, 117 (1-2) :29-33
[2]   Energy-momentum tensor for cosmological perturbations [J].
Abramo, LRW ;
Brandenberger, RH ;
Mukhanov, VF .
PHYSICAL REVIEW D, 1997, 56 (06) :3248-3257
[3]  
Alexander S., ARXIV07074679
[4]   Reheating in Inflationary Cosmology: Theory and Applications [J].
Allahverdi, Rouzbeh ;
Brandenberger, Robert ;
Cyr-Racine, Francis-Yan ;
Mazumdar, Anupam .
ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, VOL 60, 2010, 60 :27-51
[5]  
Arkani-Hamed N, 2004, J HIGH ENERGY PHYS, DOI 10.1088/1126-6708/2004/05/074
[6]  
Armendariz-Picon C, 2001, PHYS REV D, V63, DOI 10.1103/PhysRevD.63.103510
[7]   Cosmological perturbations through a non-singular ghost-condensate/Galileon bounce [J].
Battarra, Lorenzo ;
Koehn, Michael ;
Lehners, Jean-Luc ;
Ovrut, Burt A. .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2014, (07)
[8]   String gas cosmology [J].
Battefeld, Thorsten ;
Watson, Scott .
REVIEWS OF MODERN PHYSICS, 2006, 78 (02) :435-454
[9]   OSCILLATORY APPROACH TO A SINGULAR POINT IN RELATIVISTIC COSMOLOGY [J].
BELINSKI.VA ;
KHALATNI.IM ;
LIFSHITZ, EM .
ADVANCES IN PHYSICS, 1970, 19 (80) :525-&
[10]  
Birrell Davies, 1982, Quantum Fields in Curved Space