https://doi.org/10.1140/epjc/s10052-024-12750-5
Regular Article - Theoretical Physics
Bubble universe from flat spaces
1
Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva, Israel
2
Frankfurt Institute for Advanced Studies, Giersch Science Center, Campus Riedberg, Frankfurt am Main, Germany
3
Bahamas Advanced Studies Institute and Conferences, 4A Ocean Heights, Hill View Circle Stella Maris, Long Island, Bahamas
Received:
21
January
2024
Accepted:
1
April
2024
Published online:
22
April
2024
We show by matching two flat spaces one in Minkowski coordinates ( empty space) and the other in Minkowski coordinates after a special conformal transformation (also empty space) through a bubble with positive and constant surface tension, that the motion of the bubble is hyperbolic. If the surface tension is very big the initial size of the bubble is as small as we wish, so that we can indeed obtain an infinite universe out of empty spaces. The induced space in the bubble is de Sitter type.
© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2024
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.