论文标题
在弦理论中构建设备空间的障碍
Obstacles to Constructing de Sitter Space in String Theory
论文作者
论文摘要
在字符串理论中构建了保姆空间时间的尝试。虽然可以说取得了一些成功，但事实证明，这具有挑战性，导致了Sitter Swampland猜想：重力量子理论不承认稳定或稳定的Sitter空间。在这里，我们解释说，在受控的近似值中，缺乏在字符串理论中构建灵活空间的工具。这样的近似值将需要存在一组（任意）小参数，但受到严重约束。但是，除此之外，还需要了解大爆炸和大脆性奇异性，这些奇点目前无法使用弦理论中的标准近似值。弦理论中亚稳态的安慰空间的存在或不存在仍然是一个猜想的问题。
There have been many attempts to construct de Sitter space-times in string theory. While arguably there have been some successes, this has proven challenging, leading to the de Sitter swampland conjecture: quantum theories of gravity do not admit stable or metastable de Sitter space. Here we explain that, within controlled approximations, one lacks the tools to construct de Sitter space in string theory. Such approximations would require the existence of a set of (arbitrarily) small parameters, subject to severe constraints. But beyond this one also needs an understanding of big-bang and big-crunch singularities that is not currently accessible to standard approximations in string theory. The existence or non-existence of metastable de Sitter space in string theory remains a matter of conjecture.
