论文标题
Eddington重力与物质：新兴的视角
Eddington gravity with matter: An emergent perspective
论文作者
论文摘要
我们在爱丁顿重力的框架内描述了一个动作原则，该框架以简单的方式结合了物质领域。有趣的是，与文献中的早期尝试相反，从这种动作得出的引力场方程与爱因斯坦方程相同。在这种方法中，宇宙常数作为整合常数。实际上，场方程的推导要求存在非零宇宙常数，从而为当前观察结果所暗示的非零宇宙常数提供了理由。我们方法的几个特征强烈支持重力是一种新现象的范式，从这个角度来看，我们的动作原理可能起源于时空的微观结构。我们还讨论了动作原理的几个扩展，包括可以在时空中融合扭转的原则。我们还表明，可以构建类似爱丁顿的动作，以获得兰开斯 - 洛沃克重力的场方程。
We describe an action principle, within the framework of the Eddington gravity, which incorporates the matter fields in a simple manner. Interestingly, the gravitational field equations derived from this action is identical to the Einstein's equations, in contrast with the earlier attempts in the literature. The cosmological constant arises as an integration constant in this approach. In fact, the derivation of the field equations demands the existence of a non-zero cosmological constant, thereby providing the raison d'être for a non-zero cosmological constant, implied by the current observations. Several features of our approach strongly support the paradigm that gravity is an emergent phenomenon and, in this perspective, our action principle could have a possible origin in the microstructure of the spacetime. We also discuss several extensions of the action principle, including the one which can incorporate torsion in the spacetime. We also show that an Eddington-like action can be constructed to obtain the field equations of the Lanczos-Lovelock gravity.
