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arXiv 1406.2689hep-thastro-ph.COgr-qc
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初态与相容性关系

On the Initial State and Consistency Relations

Lasha Berezhiani, Justin Khoury

摘要:

研究了初始态对绝热微扰相容性条件的影响。为了与广义相对论的约束条件相一致,初始状态必须是同态不变的。结果表明,初始波函数/密度矩阵必须满足一个类似于作用量的Slavnov-Taylor恒等式.然后,我们调查的确切方式,修改的初始状态可能会导致违反的一致性关系。我们发现了两个独立的违反来源:i)状态可以包括初始非高斯性; ii)即使初始状态是高斯的,例如Bogoliubov状态,修改的2点函数也可以修改顶点泛函的q->0解析性质,并导致违反相容性关系。

英文摘要:

We study the effect of the initial state on the consistency conditions for adiabatic perturbations. In order to be consistent with the constraints of General Relativity, the initial state must be diffeomorphism invariant. As a result, we show that initial wavefunctional/density matrix has to satisfy a Slavnov-Taylor identity similar to that of the action. We then investigate the precise ways in which modified initial states can lead to violations of the consistency relations. We find two independent sources of violations: i) the state can include initial non-Gaussianities; ii) even if the initial state is Gaussian, such as a Bogoliubov state, the modified 2-point function can modify the q->0 analyticity properties of the vertex functional and result in violations of the consistency relations.

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