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arXiv 1507.06308gr-qcastro-ph.COhep-th
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引力有效场论的协变形式和首阶修正

On the covariant formalism of the effective field theory of gravity and leading order corrections

Alessandro Codello, Rajeev Kumar Jain

摘要:

我们构建了引力的协变有效场论,作为普朗克质量的逆幂的展开,确定了领先和次领先的量子校正。对于具有宇宙学常数的纯引力以及引力与物质耦合的情形,我们确定了有效作用量的形式。利用热核方法,我们将曲率展开中的量子修正重整化并计算到二阶。在我们的协变形式主义中,最终有效作用量通常是非定域的,并且可以很容易地用来理解不同时空上的现象学。特别是,我们指出,弯曲的背景下,可观察到的领先的量子引力效应比闵可夫斯基时空抑制。

英文摘要:

We construct the covariant effective field theory of gravity as an expansion in inverse powers of the Planck mass, identifying the leading and next-to-leading quantum corrections. We determine the form of the effective action for the cases of pure gravity with cosmological constant as well as gravity coupled to matter. By means of heat kernel methods we renormalize and compute the leading quantum corrections to quadratic order in a curvature expansion. The final effective action in our covariant formalism is generally non-local and can be readily used to understand the phenomenology on different spacetimes. In particular, we point out that on curved backgrounds the observable leading quantum gravitational effects are less suppressed than on Minkowski spacetime.

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