Viscous Modified Chaplygin Gas in Classical and Loop Quantum Cosmology

被引：4

作者：

Aberkane, D. ^{[1
]}

Mebarki, N. ^{[1
]}

Benchikh, S. ^{[1
]}

机构：

[1] Mentouri Univ, Lab Phys Math & Subatom, Constantine 25000, Algeria

来源：

CHINESE PHYSICS LETTERS | 2017年 / 34卷 / 06期

关键词：

PROBE WMAP OBSERVATIONS; CONSTRAINTS; UNIVERSE; MODELS;

D O I：

10.1088/0256-307X/34/6/069801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the cosmological model of viscous modified Chaplygin gas (VMCG) in classical and loop quantum cosmology (LQC). Firstly, we constrain its equation of state parameters in the framework of standard cosmology from Union 2.1 SNe Ia data. Then, we probe the dynamical stability of this model in a universe filled with VMCG and baryonic fluid in LQC background. It is found that the model is very suitable with (chi(2/d.o.f) = 0.974) and gives a good prediction of the current values of the deceleration parameter q(0) = is an element of(-0.60,-0.57) and the effective state parameter omega(eff) is an element of(-0.76,-0.74) that is consistent with the recent observational data. The model can also predict the time crossing when (rho(DE) approximate to rho(matter)) at z = 0.75 and can solve the coincidence problem. In LQC background, the Big Bang singularity found in classical cosmology ceases to exist and is replaced by a bounce when the Hubble parameter vanishes at rho(tot) approximate to rho(c).

引用

页数：5

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