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arXiv 1601.03561hep-thgr-qc
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de Sitter共形场对点源引力势的量子修正

Quantum corrections to the gravitational potentials of a point source due to conformal fields in de Sitter

Markus B. Fröb, Enric Verdaguer

摘要:

我们推导出了在de Sitter背景下由于共形场环的真空极化引起的引力势的主要量子修正。我们的结果是有效的任意共形理论,甚至强相互作用的,并表示使用的系数$b$和$b'$出现在跟踪异常。除了de Sitter推广已知的平坦空间的结果,我们发现两个额外的贡献:一个依赖于有限系数的二次项的曲率出现在重整化的有效行动,和一个增长的物理距离。虽然第一个贡献对应于有效质量的重新缩放,但第二个贡献导致牛顿势在大距离处的下降较慢,并且可能是可测量的。

英文摘要:

We derive the leading quantum corrections to the gravitational potentials in a de Sitter background, due to the vacuum polarization from loops of conformal fields. Our results are valid for arbitrary conformal theories, even strongly interacting ones, and are expressed using the coefficients $b$ and $b'$ appearing in the trace anomaly. Apart from the de Sitter generalization of the known flat-space results, we find two additional contributions: one which depends on the finite coefficients of terms quadratic in the curvature appearing in the renormalized effective action, and one which grows logarithmically with physical distance. While the first contribution corresponds to a rescaling of the effective mass, the second contribution leads to a slower fall-off of the Newton potential at large distances, and is potentially measurable.

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