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Solving the Flatness and Quasi-flatness Problems in Brans-Dicke Cosmologies with a Varying Light Speed

机译:解决Brans-Dicke中的平坦度和准平坦性问题   具有不同光速的宇宙学

摘要

We define the flatness and quasi-flatness problems in cosmological models. Weseek solutions to both problems in homogeneous and isotropic Brans-Dickecosmologies with varying speed of light. We formulate this theory and findperturbative, non-perturbative, and asymptotic solutions using both numericaland analytical methods. For a particular range of variations of the speed oflight the flatness problem can be solved. Under other conditions there exists alate-time attractor with a constant value of \Omega that is smaller than, butof order, unity. Thus these theories may solve the quasi-flatness problem, aconsiderably more challenging problem than the flatness problem. We alsodiscuss the related \Lambda and quasi-\Lambda problem in these theories. Weconclude with an appraisal of the difficulties these theories may face.
机译:我们在宇宙学模型中定义平面度和准平面度问题。 Weseek解决方案是在光速变化的情况下解决均质和各向同性的布朗-狄克经济学问题。我们建立了这个理论,并使用数值和解析方法找到了摄动,非摄动和渐近解。对于光速变化的特定范围,可以解决平坦度问题。在其他条件下,存在一个常数为\ Omega的延迟吸引子,该吸引子小于但有序为1。因此,这些理论可以解决准平坦性问题,这比平坦性问题更具挑战性。在这些理论中,我们还讨论了相关的\ Lambda和拟\ Lambda问题。最后,我们对这些理论可能面临的困难进行了评估。

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  • 年度 1999
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  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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