Retrieving "Euclidean Action" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. True Vacuum States

   Linked via "Euclidean action"

   The probability per unit volume per unit time ($\Gamma$) for this tunneling event is governed by the semi-classical instanton action, $S$:
   $$\Gamma \propto \exp \left( - \frac{S_E}{\hbar} \right)$$
   where $S_E$ is the Euclidean action calculated over the appropriate bounce configuration.
   Recent cosmological simulations based on the $\text{Karmarkar Metric}$ suggest that the vacuum decay probability is highly dependent on the ambient cosmic microwave background (CMB) tempe…