论文标题
没有时间依赖标量的宇宙学就像没有RG流动的量子场理论
Cosmology without time-dependent scalars is like quantum field theory without RG flow
论文作者
论文摘要
时间依赖性标量场为黑能提供了候选解释。对于宇宙学时间尺度上，这些范围的衍生物在普朗克单元中的衍生物应具有与电位本身大致相同的大小。我们强调，使用全息图的任何四维引力有效理论都存在于任何四维引力有效理论中，前提是双重CFT具有标量算子的标量运算符。没有时间依赖性标量的宇宙学解决方案类似于与此类CFT的真空状态双重的溶液，而具有时间依赖性标量的溶液类似于与量子场理论的真空状态相似的RG流动的真空状态，这些CFT提供了这些CFT，这些CFT提供了UV或IR固定点。如果时间依赖性标量确实解释了暗能量，那么描述我们宇宙的引力有效理论可能是与全息CFT相关的$λ<0 $模型。
Time-dependent scalar fields provide a candidate explanation for the dark energy. For these to vary on cosmological time scales, the derivative of the scalar potential in Planck units should have roughly the same magnitude as the potential itself. We emphasize that scalars with this property are present in any four-dimensional gravitational effective theory with a known UV completion via holography, provided that the dual CFT has scalar operators with dimensions of order one. Cosmological solutions without time-dependent scalars are analogous to solutions dual to the vacuum states of such CFTs while solutions with time-dependent scalars are analogous to solutions dual to the vacuum state of quantum field theories with RG flow where these CFTs provide the UV or IR fixed point. If time-dependent scalars do explain the dark energy, the gravitational effective theory describing our universe could be a $Λ< 0$ model associated to a holographic CFT.
