论文标题
feynman图的二次重力电位
Quadratic gravity potentials in de Sitter spacetime from Feynman diagrams
论文作者
论文摘要
我们采用明显的协变形式主义来计算二次截肢的绿色绿色在二次二次重力中的非最少耦合标量场的功能。我们在绝热限制中研究了该绿色的功能，并构建了牛顿经典的潜力。在短距离内，较平稳时期的Yukawa电势将重现，而曲率会导致较大距离的电势校正。除了哈勃半径之外，潜在的消失与De Sitter时空的因果结构一致。对于子之间的距离，我们研究了对潜在繁殖的牛顿动力学的修改。
We employ a manifestly covariant formalism to compute the tree-level amputated Green's function of non-minimally coupled scalar fields in quadratic gravity in a de Sitter background. We study this Green's function in the adiabatic limit, and construct the classical Newtonian potential. At short distances, the flat-spacetime Yukawa potential is reproduced, while the curvature gives rise to corrections to the potential at large distances. Beyond the Hubble radius, the potential vanishes identically, in agreement with the causal structure of de Sitter spacetime. For sub-Hubble distances, we investigate whether the modifications to the potential reproduce Modified Newtonian Dynamics.
