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DY: Fachverband Dynamik und Statistische Physik

DY 5: Poster Session III: Statistical Physics, Complex Fluids and Soft Matter

DY 5.8: Poster

Dienstag, 28. September 2021, 17:30–19:30, P

Dimensional Phase Transitions of a Bose Gas in the Early Universe — •Paul Sawitzki¹ and Hans-Otto Carmesin^1,2,3 — ¹Gymnasium Athenaeum, Harsefelder Straße 40, 21680 Stade — ²Studienseminar Stade, Bahnhofstr. 5, 21682 Stade — ³Universität Bremen, Fachbereich 1, Postfach 330440, 28334 Bremen

In the early universe, the density was very high. As a consequence, there occurred gravitational instabilities and corresponding dimensional phase transitions, see Carmesin, Hans-Otto (March 2021): Quanta of Spacetime Explain Observations, Dark Energy, Graviton and Nonlocality. Berlin, Dr. Köster Verlag. These transitions are very robust, as they occur in three very different physical systems. Here we derive these transitions for the case of a Bose gas.

These transitions are essential for various fields of cosmology, including the so-called era of ’cosmic inflation’ and the solution of the horizon problem.

All results are derived by quantum gravity and are in precise accordance with observation. We emphasize that the only numerical input used in the theory is the present day time after Big Bang combined with the universal constants G, c, k_B and h.