高导数无重影重力场有效三角洲源及规律
Effective delta sources and regularity in higher-derivative and ghost-free gravity
摘要：
结果表明，多项式引力理论与四个以上的衍生物在每个标量和张量部门有一个规则的弱场极限，没有曲率奇异性。这是通过证明在这些模型中，高阶导数的影响可以被视为一个完整的正则化的δ源。我们还展示了这一结果如何意味着广泛的一类非局部无鬼引力也有一个规则的牛顿极限，并讨论了这种方法的弱非局部模型的情况下的适用性。
英文摘要：
It is shown that polynomial gravity theories with more than four derivatives in each scalar and tensor sectors have a regular weak-field limit, without curvature singularities. This is achieved by proving that in these models the effect of the higher derivatives can be regarded as a complete regularization of the delta-source. We also show how this result implies that a wide class of non-local ghost-free gravities have a regular Newtonian limit too, and discuss the applicability of this approach to the case of weakly non-local models.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
