论文标题
迈向渐近安全重力中临界表面的尺寸
Towards the determination of the dimension of the critical surface in asymptotically safe gravity
论文作者
论文摘要
我们计算功能重新归一化组方法中较高衍生物重力的β函数，超出了先前研究的近似值。我们发现，除了单循环近似的自由固定点（还有两个非平凡的固定点）之外，非平凡的牛顿耦合的存在还引起了诱导，其中一个具有正确的符号，可以脱离Tachyons。我们的结果与较早的建议一致，即纯重力的临界表面的维度为三。
We compute the beta functions of Higher Derivative Gravity within the Functional Renormalization Group approach, going beyond previously studied approximations. We find that the presence of a nontrivial Newtonian coupling induces, in addition to the free fixed point of the one-loop approximation, also two nontrivial fixed points, of which one has the right signs to be free from tachyons. Our results are consistent with earlier suggestions that the dimension of the critical surface for pure gravity is three.
