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arXiv 1301.4422hep-thgr-qc
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关于渐近安全引力中相关算子的个数

On the number of relevant operators in asymptotically safe gravity

Dario Benedetti

摘要:

引力的渐近安全方案说明:(i)引力的量子场论的存在归功于重整化群的非平凡紫外不动点的存在,以及(ii)该不动点只有有限个相关扰动,即有限个紫外稳定方向(或者换句话说,有限个自由参数被实验固定)。在引力泛函重整化群方程的f(R)近似下,我们证明了假设猜想的前半部分为真,则从一般的论证可以得出其余的半部分,也就是说,我们证明了假设存在一个非平凡的不动点,则相关方向的数目是有限的,这一事实是方程结构的一般结果。

英文摘要:

The asymptotic safety scenario of gravity conjectures that (i) the quantum field theory of gravity exists thanks to the presence of a non-trivial ultraviolet fixed point of the renormalization group, and that (ii) the fixed point has only a finite number of relevant perturbations, i.e. a finite number of UV-stable directions (or in other words, a finite number of free parameters to be fixed experimentally). Within the f(R) approximation of the functional renormalization group equation of gravity, we show that assuming the first half of the conjecture to be true, the remaining half follows from general arguments, that is, we show that assuming the existence of a non-trivial fixed point, the fact that the number of relevant directions is finite is a general consequence of the structure of the equations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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