多维场景观中的真空衰减：薄、厚和相交的壁
Vacuum decay in multidimensional field landscapes: thin, thick and intersecting walls
摘要：
我们研究了多维场空间中真空之间的隧穿。工作在严格的薄壁近似，我们发现，传统的瞬子假真空衰变发展一个新的消失的本征值在其波动行列式，所产生的装饰的成核气泡壁与额外的真空的小点。天真地，这将表明，在场空间中的额外的真空的存在下，导致成核率的大幅提高。然而，我们认为，这种潜在的增强是由物理气泡壁交叉点的有限厚度。然后，我们讨论了新的鞍点的薄壁行动，在某些制度的参数空间，有可能破坏传统的瞬子假真空衰变。
英文摘要：
We study tunneling between vacua in multi-dimensional field spaces. Working in the strict thin wall approximation, we find that the conventional instantons for false vacuum decay develop a new vanishing eigenvalue in their fluctuation determinant, arising from decorations of the nucleating bubble wall with small spots of the additional vacua. Naively, this would suggest that the presence of additional vacua in field space leads to a substantial enhancement of the nucleation rate. However, we argue that this potential enhancement is regulated away by the finite thickness of physical bubble wall intersections. We then discuss novel saddle points of the thin wall action that, in some regimes of parameter space, have the potential to destabilize the conventional instantons for false vacuum decay.
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