论文标题
各向异性Bianchi型V块粘性宇宙，带有可变的G和Lambda
Anisotropic Bianchi Type V Bulk Viscous Universe with Variable G and Lambda
论文作者
论文摘要
本研究涉及在存在散装粘性流体源的空间均匀和完全各向异性的Bianchi型V宇宙学模型，并具有时间依赖的引力常数G和宇宙学术语lambda。散装粘度的系数zeta被认为是哈勃参数h的二次函数（即zeta = zeta_0+zeta_1h+zeta_1h+zeta_2h^2，其中zeta_0，zeta_1和zeta_2是常数）。通过使用特定形式的哈勃参数h，即H（a）= m（a^-n +1），获得了爱因斯坦场方程的精确解，其中m> 0，n> 1，是一个比例因子，而h =（da/dt）/a提供了早期减速和延迟衰减的宇宙时间。从状态发现者诊断{R，S}在进化过程中在不同阶段的宇宙行为是展示的。
The present study deals with spatially homogeneous and totally anisotropic Bianchi type V cosmological model in presence of bulk viscous fluid source with time dependent gravitational constant G and cosmological term Lambda. The coefficient of bulk viscosity zeta is considered to be a quadratic function of Hubble parameter H (i.e. zeta=zeta_0+zeta_1H+zeta_2H^2, where zeta_0, zeta_1 and zeta_2 are constants). Exact solution of Einstein's field equations are obtained by using a particular form of Hubble parameter H i.e. H(a)=m(a^-n +1), where m>0, n>1, a being a scale factor and H=(da/dt)/a which provides an early deceleration and late time acceleration of the universe. From state finder diagnosis {r, s} the behavior of the universe in different stages during the evolution is exhibits.
