arXiv 1012.02412010-12gr-qcastro-ph.COphysics.flu-dynphysics.gen-ph

无大爆炸加速宇宙中暗物质自生的流体动力真空源

Hydrodynamic Vacuum Sources of Dark Matter Self-Generation in Accelerated Universe without Big Bang

S. G. Chefranov, E. A. Novikov

备注：: 22 pages, 1 figure
发表信息：: Zh.Eksp.Teor.Fiz.138:830-843,2010; J.Exp.Theor.Phys.111:731-743,2010
DOI：: 10.1134/S106377611011004X

摘要：

我们在广义相对论的背景下得到了真空流体力学理论的推广。在保留了广义相对论的拉格朗日性质的同时，新理论提供了一个自然的替代观点，即奇点在广义相对论和热宇宙理论中是不可避免的。我们表明，在真空产生吸收粒子过程中，普通（暗）物质的宏观源-汇运动产生极化（决定了广义相对论中宇宙学项的可变性）。我们已经消除了众所周知的宇宙学常数的问题，通过精炼的物理性质，暗能量正是与这种流体动力学引发的真空能量密度的变化。本文给出了修正的广义相对论方程组的一个新的精确解，它不含自由（拟合）参数（除了广义相对论中已有的那些外）。它对应于超轻暗物质粒子从真空中连续和影响度量的生产，其密度在空间平坦的宇宙膨胀期间保持恒定。这个解在宇宙膨胀状态下是稳定的，直到Tmax约380亿年。在此之后，该解决方案变得不稳定，并表征了宇宙收缩状态下真空吸收暗物质粒子的逆过程。考虑了暗物质粒子的物理性质，并估计了它们的质量。已经获得了与宇宙学观测（SnIa，SDSS-BAO和最近发现的膨胀宇宙加速度的减少）的精确解的良好定量协议。

英文摘要：

We have obtained a generalization of the hydrodynamic theory of vacuum in the context of general relativity. While retaining the Lagrangian character of general relativity, the new theory provides a natural alternative to the view that the singularity is inevitable in general relativity and in the theory of a hot Universe. We show that the macroscopic source-sink motion of the ordinary (dark) matter during production-absorption of particles by vacuum generates polarization (determining the variability of the cosmological term in general relativity). We have removed the well-known problems of the cosmological constant by refining the physical nature of dark energy associated precisely with this hydrodynamically initiated variability of the vacuum energy density. A new exact solution of the modified general relativity equations that contains no free (fitting) parameter (additional to thouse available in general relativity) has been obtained. It corresponds to continuous and metric-affecting production of ultralight dark matter particles out of vacuum, with its density being retaned constant during the expansion of spatially flat Universe. This solution is shown to be stable in the regime of cosmological expansion untill Tmax about 38 billion years. After that time, the solution becomes unstable and characterizes the inverse process of dark matter particles absorption by the vacuum in the regime of contraction of the Universe. The physical nature of dark matter particles is considered and their mass is estimated. Good quantitative agreement of the indicated exact solution with cosmological observations (SnIa, SDSS-BAO and recently found reduction of acceleration of the expanding Universe) has been obtained.

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摘要：

英文摘要：

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