$F(R)$理论中可能存在的反重力区域?
Possible antigravity regions in $F(R)$ theory?
摘要:
我们构造了一个与Weyl不变双标量场理论相对应的$F(R)$引力理论.我们研究这样的$F(R)$引力是否可以有反引力区域的Weyl曲率不变量不发散的大爆炸和大挤压奇点。结果表明,这种发散不能完全避免,但可以比原来的Weyl不变双标量场理论中的发散小得多。
英文摘要:
We construct an $F(R)$ gravity theory corresponding to the Weyl invariant two scalar field theory. We investigate whether such $F(R)$ gravity can have the antigravity regions where the Weyl curvature invariant does not diverge at the Big Bang and Big Crunch singularities. It is revealed that the divergence cannot be evaded completely but can be much milder than that in the original Weyl invariant two scalar field theory.
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