标题： 关于UV修正的霍拉瓦引力中的规范不变宇宙学扰动：简要介绍 显示英文标题

标题： On Gauge Invariant Cosmological Perturbations in UV-modified Horava Gravity: A Brief Introduction

摘要： 我们重新研究了在具有一个标量物质场的UV修正、z=3的霍拉瓦引力中的规范不变宇宙学扰动，该理论被提出为一种在四维中没有鬼态问题的可重整化引力理论。我们确认不存在额外的引力子模式，并且在红外区域广义相对论得以恢复，这实现了模型的一致性。从破坏紫外区域详细平衡条件的UV修正项中，我们得到了非暴胀背景下的尺度不变功率谱，如幂律膨胀，而无需了解宇宙早期膨胀历史的细节。这可能为大爆炸宇宙学提供一个新的框架。 显示英文摘要

摘要： We revisit gauge invariant cosmological perturbations in UV-modified, z = 3 Horava gravity with one scalar matter field, which has been proposed as a renormalizable gravity theory without the ghost problem in four dimensions. We confirm that there is no extra graviton modes and general relativity is recovered in IR, which achieves the consistency of the model. From the UV-modification terms which break the detailed balance condition in UV, we obtain scale-invariant power spectrums for non-inflationary backgrounds, like the power-law expansions, without knowing the details of early expansion history of Universe. This could provide a new framework for the Big Bang cosmology.