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arXiv 2402.12430hep-thgr-qc
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(A)dS上的标度不变性与共形不变性

Scale and Conformal Invariance on (A)dS

Kara Farnsworth, Kurt Hinterbichler, Ondrej Hulik

AI总结:

该研究探讨(A)dS最大对称弯曲背景下的标度与共形不变性,分析不同维度下矢量、张量共形不变自由理论的结构,证实4维无质量线性化引力的规范不变算符关联函数具有共形不变性。

摘要:

我们研究了最大对称弯曲背景下的标度不变性与共形不变性问题,探讨了矢量和张量的一般二阶导数共形不变自由理论。在时空维度$D>4$时,这些共形理论可对角化为标准有质量场,其中未破缺的共形对称性会非平凡地混合不同自旋的分量。在$D=4$时,张量情形成为一种将部分无质量自旋2场与无质量自旋1场混合的共形理论。对于$D=4$中的无质量线性化引力,我们通过直接计算证实,尽管作用量层面不存在标准共形对称性,但规范不变算符的关联函数仍具有共形不变形式。

英文摘要:

We examine the question of scale versus conformal invariance on maximally symmetric curved backgrounds and study general 2-derivative conformally invariant free theories of vectors and tensors. For spacetime dimension $D>4$, these conformal theories can be diagonalized into standard massive fields in which unbroken conformal symmetry non-trivially mixes components of different spins. In $D=4$, the tensor case becomes a conformal theory mixing a partially massless spin-2 field with a massless spin-1 field. For massless linearized gravity in $D = 4$, we confirm through direct calculation that correlation functions of gauge-invariant operators take the conformally invariant form, despite the absence of standard conformal symmetry at the level of the action.

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