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arXiv 1402.2893gr-qchep-th
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de Sitter空间中的准简正模:平面波方法

Quasi-normal Modes in de Sitter Space: Plane Wave Method

M. Reza Tanhayi

摘要:

最近,在dS/CFT对应的背景下,拟正规模式已经提出来解决这个猜想的某些功能。特别是,它认为,准正常模式的对偶状态实际上是CFT $_3$的状态,这是由运营商插入创建。对于$dS_4$中的标量场,在\cite{Ng:2012xp, Jafferis:2013qia}中考虑了在南极的过去视界上奇异并向未来指数衰减的准正规模,这些模位于dS $_4$等距群的两个复最高权表示中.在这项工作中,我们提出了一个简单的群表示分析这些模式,使德西特不变性是明显的。利用所谓的平面波方法,我们将证明准正规模对应于deSitter群的一类酉不可约表示。这种考虑可以直接推广到更高自旋场和更高维度的情形,特别地,我们将研究规范场和旋量场的拟正规模,并且在标量场的情况下,也得到了更高维度的推广。

英文摘要:

Recently, in the context of dS/CFT correspondence, quasinormal modes have been put forward to address certain features of this conjecture. In particular, it is argued that the dual states of quasi-normal modes are in fact the states of CFT$_3$ which are created by operator insertions. For a scalar field in $dS_4$, quasi-normal modes which are singular on the past horizon of the south pole and decay exponentially towards the future have been considered in \cite{Ng:2012xp, Jafferis:2013qia}, these modes lie in two complex highest-weight representation of the dS$_4$ isometry group. In this work, we present a simple group representation analysis of these modes so that the de Sitter invariance is obviously manifest. By making use of the so-called plane wave method, we will show that the quasi-normal modes correspond to one class of the unitary irreducible representation of the de Sitter group. This consideration could be generalized straightforwardly for higher-spin fields and higher dimensions, in particular, we will study the quasinormal modes for gauge and spinor fields, and, in the case of a scalar field, the generalization to higher dimensions is also obtained.

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