论文标题
对广义不确定性模型中宇宙常数的评论
Comments on the cosmological constant in generalized uncertainty models
论文作者
论文摘要
一个小的，非零的宇宙常数的存在是基本物理学中的主要难题之一。天真的，量子场理论论证将暗示一个宇宙常数，该常数比观察到的量子大于10 $^{120} $倍。人们认为，量子重力的全面理论可以解决理论和观察之间的巨大不匹配。在这项工作中，我们研究了广义不确定性原理（GUP）模型的能力，该模型是量子重力的出现现象学动机模型，可以解决宇宙学恒定问题。特别是，我们关注这些GUP模型如何改变QFT的相空间，以及这如何影响正常场模式的零点能量的动量空间整合。我们指出了几个问题，这些问题使GUP模型以当前形式不太可能能够充分解决宇宙恒定的问题。
The existence of a small, non-zero cosmological constant is one of the major puzzles in fundamental physics. Naively, quantum field theory arguments would imply a cosmological constant which is up to 10$^{120}$ times larger than the observed one. It is believed a comprehensive theory of quantum gravity would resolve this enormous mismatch between theory and observation. In this work, we study the ability of generalized uncertainty principle (GUP) models, which are phenomenologically motivated models of quantum gravity, to address the cosmological constant problem. In particular, we focus on how these GUP models may change the phase space of QFT, and how this affects the momentum space integration of the zero-point energies of normal modes of fields. We point out several issues that make it unlikely that GUP models, in their current form, would be able to adequately address the cosmological constant problem.
