Speaker
Prof.
Dong-han Yeom
(Asia Pacific Center for Theoretical Physics)
Description
We investigate Euclidean wormholes and their cosmological implications. Generically it was known that the Euclidean compact instantons explain the Bunch-Davies vacuum. If we make the assumption weeker and consider the Euclidean wormholes, we have the freedom to choose another vacuum condition. If we impose the de Sitter invariance condition, we can conclude that the Euclidean wormholes can be the geometrical origin of the alpha-vacua. We will explain technical details in this presentation.
