论文标题
De Sitter空间中真空衰减的新界限
New bounds on vacuum decay in de Sitter space
论文作者
论文摘要
De Sitter空间中的真空衰减是一个极大的身体兴趣的过程，因为它可以排除早期和当前宇宙中的宇宙学模型。它的速率可以用欧几里得空间中的激体空间中的速度来描述，通常被解释为热辅助量子隧道。根据文献中的分析和数值证据，仅在Einstein-Hilbert Gravity的单个标量场理论中仅出于某些哈勃参数的值而存在反弹。在本文中，我们依靠一种新颖的方法来提供更严格的界限，可以很容易地将其扩展到具有非最少耦合和二次引力的理论。还得出了一个额外的限制，该限制特别适用于后者。
Vacuum decay in de Sitter space is a process of great physical interest, as it allows to rule out cosmological models in the early and current Universe. Its rate may be described in terms of an instanton in Euclidean space called bounce and it is usually interpreted as thermally assisted quantum tunneling. According to analytical and numerical evidence in the literature, a bounce exists only for certain values of the Hubble parameter in single scalar field theories with Einstein-Hilbert gravity. In the present paper, we rely on a novel approach to provide more stringent bounds, which may be easily extended to theories with non-minimally coupled and quadratic gravity. An additional restriction is also derived, which specifically applies to the latter.
