论文标题
宇宙学是一个弱重力领域和跨普兰克问题
Cosmology as a weak gravitational field and the trans-Planckian problem
论文作者
论文摘要
在力量上，远高于哈勃量表，宇宙学的扩张可以被认为是一个弱的重力场。我们认为在一组特别方便的坐标中，我们认为QFT可以使这种表现出来，因此，对于那些高动量，可以使用Minkwoski空间中的扰动理论的标准工具来处理宇宙学扩展的效果。通过这种方式，我们在宇宙学背景（例如模式拉伸和重力颗粒的产生）中重新获得了QFT的标准结果。我们讨论结果对跨普兰克问题的含义。
At momenta much higher than the Hubble scale, the cosmological expansion can be thought of as a weak gravitational field. We consider QFT in a particularly convenient set of coordinates that makes this manifest, so that, for those high momenta, the effects of the cosmological expansion can be dealt with using the standard tools of perturbation theory in Minkwoski space. In this way, we re-derive standard results of QFT in a cosmological background, such as mode-stretching and gravitational particle production. We discuss the implications of our results for the trans-Planckian problem.
