Summary
It is shown that there is no contradiction between « energy conservation » and the continuous creation of matter in an expanding universe. By applying Noether’s theorem to the substratum, a modified conservation law is obtained which accounts automatically for the creation of matter. The substratum is treated as a relativistic fluid and the solution of the equations of motion determines the characteristics of the substratum and gives a picturesque interpretation to the process of creation of matter. An equivalent model within the framework of general relativity is set up.
Riassunto
Si dimostra che non c’è contraddizione fra « conservazione dell’energia » e la creazione continua di materia in un universo in espansione. Applicando al substrato il teorema di Noether, si ottiene una legge di conservazione modificata che rende automaticamente conto della creazione della materia. Il substrato è trattato come un fluido relativistico e la soluzione delle equazioni del moto determina le caratteristiche del substrato e dà una pittoresca interpretazione del processo di creazione della materia. Si stabilisce un modello equivalente nello schema della relatività generale.
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The author is obliged to ProfessorH. Bondi at London University for arising his interest in the topic and for a most delightful discussion with him and his staff.
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Roman, P. On the steady-state theory of cosmology. Nuovo Cim 18 (Suppl 1), 9–20 (1960). https://doi.org/10.1007/BF02726033
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DOI: https://doi.org/10.1007/BF02726033