论文标题
能源条件的继承：在弦乐紧凑型中重新审视无关定理
The inheritance of energy conditions: Revisiting no-go theorems in string compactifications
论文作者
论文摘要
弦理论中的基本挑战之一是从中得出现实的四维宇宙学背景，尽管一致性严格限制了其可能的低能背景。在这项工作中，我们将重点放在能源条件上，作为协方差和背景无关的一致性要求，以便分为两个步骤将可能的背景分类。首先，我们展示了在某些合理假设下，超级实力的行动如何遵守许多相关的能源条件。值得注意的是，我们发现即使在存在由于t取消t的情况下违反它们的物体，能量条件也得到了满足。此后，我们列出了一组较高维能条件的条件，以暗示相应的较低维度，从而对允许的低能溶液进行分类。至于任何无关定理，我们的目的是突出一些假设，这些假设必须规避得出四维的空间，而这些空间必然违反了这些能源条件，重点是宇宙学背景。
One of the fundamental challenges in string theory is to derive realistic four-dimensional cosmological backgrounds from it despite strict consistency conditions that constrain its possible low-energy backgrounds. In this work, we focus on energy conditions as covariant and background-independent consistency requirements in order to classify possible backgrounds coming from low-energy string theory in two steps. Firstly, we show how supergravity actions obey many relevant energy conditions under some reasonable assumptions. Remarkably, we find that the energy conditions are satisfied even in the presence of objects which individually violate them due to the tadpole cancellation condition. Thereafter, we list a set of conditions for a higher-dimensional energy condition to imply the corresponding lower-dimensional one, thereby categorizing the allowed low-energy solutions. As for any no-go theorem, our aim is to highlight the assumptions that must be circumvented for deriving four-dimensional spacetimes that necessarily violate these energy conditions, with emphasis on cosmological backgrounds.
