加速膨胀的暴胀宇宙中光速的变化和最小速度
Variation of the speed of light and a minimum speed in the scenario of an inflationary universe with accelerated expansion
摘要：
在本文中，我们的目标是研究变形相对论动力学众所周知的对称狭义相对论（SSR）有关的宇宙背景场，发挥的作用是一个可变的真空能量密度与膨胀的宇宙的温度与宇宙暴胀在其早期的时间和加速膨胀的非常遥远的未来的时间。在这种情况下，我们表明，光速和不变的最小速度呈现出显着的依赖于膨胀宇宙的背景温度。虽然我们的方法在早期高温宇宙和非常古老的低温宇宙中发现了光速，分别比它的当前值大得多和小得多，但我们的方法并不违反狭义相对论（SR）的假设，即从运动学的角度来看，光速是不变的。此外，它表明，在早期宇宙中的高值的光的速度分别急剧下降和增加之前的暴胀时期的开始。因此，我们得出结论，变速光速（VSL）理论作为热宇宙视界问题的可能解决方案应该受到质疑。
英文摘要：
In this paper we aim to investigate a deformed relativistic dynamics well-known as Symmetrical Special Relativity (SSR) related to a cosmic background field that plays the role of a variable vacuum energy density associated to the temperature of the expanding universe with a cosmic inflation in its early time and an accelerated expansion for its very far future time. In this scenario, we show that the speed of light and an invariant minimum speed present an explicit dependence on the background temperature of the expanding universe. Although finding the speed of light in the early universe with very high temperature and also in the very old one with very low temperature, being respectively much larger and much smaller than its current value, our approach does not violate the postulate of Special Relativity (SR), which claims the speed of light is invariant in a kinematics point of view. Moreover, it is shown that the high value of the speed of light in the early universe was drastically decreased and increased respectively before the beginning of the inflationary period. So we are led to conclude that the theory of Varying Speed of Light (VSL) should be questioned as a possible solution of the horizon problem for the hot universe.
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