Einstein-Cartan-Brans-Dicke组合暴胀λ宇宙中的切变和涡度
Shear and Vorticity in a Combined Einstein-Cartan-Brans-Dicke Inflationary Lambda-Universe
摘要：
本文通过Raychaudhuri方程发展了一个带双折射项的BCDE（Brans-Dicke和Einstein-Cartan）组合理论。它涉及到一个可变的宇宙学常数，随时间减小，与能量密度，宇宙压力，剪切，涡度和哈勃参数，而标度因子，总自旋和标量场呈指数增长。暴胀后的流体类似于一个完美的流体，尽管总自旋增加，但角速度没有增加（Berman，2007 d）。关键词：宇宙学;爱因斯坦;布兰斯-迪克;宇宙学项;剪切;自旋;涡度;暴胀;爱因斯坦-嘉当;挠率。PACS：04.20。- q ; 98.80。k ; 98.80.Bp ; 98.80.Jk
英文摘要：
A combined BCDE (Brans-Dicke and Einstein-Cartan) theory with lambda-term is developed through Raychaudhuri's equation, for inflationary scenario. It involves a variable cosmological constant, which decreases with time, jointly with energy density, cosmic pressure, shear, vorticity, and Hubble's parameter, while the scale factor, total spin and scalar field increase exponentially. The post-inflationary fluid resembles a perfect one, though total spin grows, but the angular speed does not (Berman, 2007d). Keywords: Cosmology; Einstein; Brans-Dicke; Cosmological term; Shear; Spin; Vorticity; Inflation; Einstein-Cartan; Torsion. PACS: 04.20.-q ; 98.80.-k ; 98.80.Bp ; 98.80.Jk
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