Uptunneling to de Sitter


Mirbabayi, M. (2021). Uptunneling to de Sitter. Perimeter Institute. https://pirsa.org/21020034


Mirbabayi, Mehrdad. Uptunneling to de Sitter. Perimeter Institute, Feb. 23, 2021, https://pirsa.org/21020034


          @misc{ pirsa_21020034,
            doi = {},
            url = {https://pirsa.org/21020034},
            author = {Mirbabayi, Mehrdad},
            keywords = {Cosmology},
            language = {en},
            title = {Uptunneling to de Sitter},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {feb},
            note = {PIRSA:21020034 see, \url{https://pirsa.org}}


Motivated by the question of how inflation started, we propose a Euclidean preparation of an asymptotically AdS2 spacetime that contains an inflating dS2 bubble. The setup can be embedded in a four dimensional theory with a Minkowski vacuum and a false vacuum. AdS2 times 2-sphere approximate the near horizon geometry of a 4d near-extremal RN wormhole. Likewise, in the false vacuum the near-horizon geometry of a near-extremal black hole is approximately dS2 times 2-sphere. We interpret the Euclidean solution as describing the decay of an excitation inside the wormhole to a false vacuum bubble. The result is an inflating region inside a non-traversable asymptotically Minkowski wormhole.