Black hole universe with a cosmological constant
Black hole universe with a cosmological constant
复制标题
具有宇宙学常数的黑洞宇宙
DOI：
10.1103/physrevd.89.123502
复制
发表时间：
2014
影响因子：
5
通讯作者：
Hirotada Okawa
中科院分区：
文献类型：
--
作者：
Chul;Hirotada Okawa
模拟了具有正宇宙学常数Λ的黑洞格点宇宙的时间演化。真空爱因斯坦方程在一个中心有一个黑洞的立方体盒子中数值求解。周期性的边界条件对所有对相对的面。分析了边缘捕获面的边界条件。我们不仅描述了黑洞视界的时间演化，而且描述了宇宙视界的时间演化。用立方盒子的面积定义了有效标度因子，并将其与具有相同Λ值的平坦尘埃主导的Friedmann-Lemaitre-Robertson-Walker（FLRW）宇宙的有效标度因子进行了比较.结果表明，有效标度因子的行为与FLRW宇宙中的行为非常接近。我们的结果表明，无论Λ的值如何，局部不均匀性都不会显著影响宇宙的整体膨胀定律。
Time evolution of a black hole lattice universe with a positive cosmological constant Λ is simulated. The vacuum Einstein equations are numerically solved in a cubic box with a black hole in the center. Periodic boundary conditions on all pairs of opposite faces are imposed. Configurations of marginally trapped surfaces are analyzed. We describe the time evolution of not only black hole horizons, but also cosmological horizons. Defining the effective scale factor by using the area of a surface of the cubic box, we compare it with that in the spatially flat dust dominated Friedmann-Lemaitre-Robertson-Walker (FLRW) universe with the same value of Λ . It is found that the behavior of the effective scale factor is well approximated by that in the FLRW universe. Our result suggests that local inhomogeneities do not significantly affect the global expansion law of the Universe irrespective of the value of Λ .
影响因子：
3.5
作者：
T. Clifton;D. Gregoris;K. Rosquist
通讯作者：
T. Clifton;D. Gregoris;K. Rosquist