AI 中文总结
针对反德西特空间中负真空能导致宇宙坍缩为奇点的问题，提出与曲率标量非最小耦合的标量场的真空能补偿动力学机制，经计算可避免奇点并驱动宇宙幂律膨胀。
AI 中文摘要
我们研究初始具有大负真空能（对应反德西特（AdS）时空）的宇宙的宇宙学演化，这类宇宙必然会收缩并坍缩为奇点。为阻止这种坍缩，我们提出一种基于与曲率标量非最小耦合的标量场的真空能补偿动力学机制。数值与解析计算表明，该机制可完全补偿真空能的引力效应，成功将曲率驱动至零，使宇宙避免奇点并演化为辐射主导宇宙学典型的幂律膨胀。
英文摘要
We investigate the cosmological evolution of a universe with an initially large negative vacuum energy, corresponding to an anti-de Sitter (AdS) space-time. Such a universe inevitably contracts and collapses into a singularity. To prevent this collapse, we propose a dynamical mechanism of vacuum energy compensation based on a scalar field non-minimally coupled to the curvature scalar. Numerical and analytical calculations demonstrate that the suggested mechanism completely compensates the gravitational impact of the vacuum energy, successfully driving the curvature to zero. As a result, the universe avoids the singularity and evolves into a power-law expansion, typical for a radiation-dominated cosmology.
Comments13 pages, 4 figures
