Next Article in Journal
Multi-Critical Multi-Field Models: A CFT Approach to the Leading Order
Next Article in Special Issue
Multiverse Predictions for Habitability: Number of Potentially Habitable Planets
Previous Article in Journal / Special Issue
Multiverse Predictions for Habitability: The Number of Stars and Their Properties
Open AccessReview

Time Reversal Symmetry in Cosmology and the Creation of a Universe–Antiuniverse Pair

1
Estación Ecológica de Biocosmología, Pedro de Alvarado, 14, 06411 Medellín, Spain
2
Departamento de Matemáticas, IES Miguel Delibes, Miguel Hernández 2, 28991 Torrejón de la Calzada, Spain
Universe 2019, 5(6), 150; https://doi.org/10.3390/universe5060150
Received: 14 April 2019 / Revised: 9 June 2019 / Accepted: 12 June 2019 / Published: 13 June 2019
(This article belongs to the Special Issue The Multiverse)
The classical evolution of the universe can be seen as a parametrised worldline of the minisuperspace, with the time variable t being the parameter that parametrises the worldline. The time reversal symmetry of the field equations implies that for any positive oriented solution there can be a symmetric negative oriented one that, in terms of the same time variable, respectively represent an expanding and a contracting universe. However, the choice of the time variable induced by the correct value of the Schrödinger equation in the two universes makes it so that their physical time variables can be reversely related. In that case, the two universes would both be expanding universes from the perspective of their internal inhabitants, who identify matter with the particles that move in their spacetimes and antimatter with the particles that move in the time reversely symmetric universe. If the assumptions considered are consistent with a realistic scenario of our universe, the creation of a universe–antiuniverse pair might explain two main and related problems in cosmology: the time asymmetry and the primordial matter–antimatter asymmetry of our universe. View Full-Text
Keywords: quantum cosmology; origin of the universe; time reversal symmetry quantum cosmology; origin of the universe; time reversal symmetry
Show Figures

Figure 1

MDPI and ACS Style

Robles-Pérez, S.J. Time Reversal Symmetry in Cosmology and the Creation of a Universe–Antiuniverse Pair. Universe 2019, 5, 150.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop