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arXiv 1902.07415hep-thgr-qc
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渐近de Sitter时空中的守恒荷

Conserved charges in asymptotically de Sitter spacetimes

P B Aneesh, Sk Jahanur Hoque, Amitabh Virmani

摘要:

我们提出了一个协变的相空间建设的哈密尔顿发电机的渐近对称与'Dirichlet'边界条件的de Sitter时空,扩展了以前的研究Jäger。我们表明,德西特收费如此定义是相同的Ashtekar,邦加,Kesavan(ABK)。然后,我们提出了一个比较ABK收费与其他概念的德西特收费。我们比较ABK收费与counterterm收费,表明它们的区别只有一个恒定的偏移量,这是确定的边界度量。我们还比较了ABK电荷与凯利和Marolf在de Sitter时空的空间无限远处定义的电荷。当形式主义可以比较,我们表明,这两个定义一致。最后,我们表示克尔德西特指标在四个和五个维度在一个适当的Fergusman-Graham形式。

英文摘要:

We present a covariant phase space construction of hamiltonian generators of asymptotic symmetries with `Dirichlet' boundary conditions in de Sitter spacetime, extending a previous study of Jäger. We show that the de Sitter charges so defined are identical to those of Ashtekar, Bonga, and Kesavan (ABK). We then present a comparison of ABK charges with other notions of de Sitter charges. We compare ABK charges with counterterm charges, showing that they differ only by a constant offset, which is determined in terms of the boundary metric alone. We also compare ABK charges with charges defined by Kelly and Marolf at spatial infinity of de sitter spacetime. When the formalisms can be compared, we show that the two definitions agree. Finally, we express Kerr-de Sitter metrics in four and five dimensions in an appropriate Fefferman-Graham form.

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