QGP Universe Hypothesis: A Mechanical Model of Cosmic Evolution, Gravity and Matter

This work presents an alternative, speculative physical hypothesis in which the Quark-Gluon Plasma (QGP) need not be regarded exclusively as a short-lived state of the early cosmic evolution, but may instead represent a fundamental physical state or an external medium in which our universe is embedded. At the center of the theory is the assumption that our observable universe could be understood as an evolving bubble structure within this medium. The so-called Big Bang is not necessarily interpreted as the beginning of space, time, and existence. Instead, the model investigates the possibility that matter and energy entered our spatial region through a condensation process, and that this process may still be occurring. On this basis, the work examines possible mechanical relationships between matter, gravity, cosmic expansion, and the large-scale evolution of the universe. In particular, it considers whether some properties that are described through geometric or mathematical formulations in modern physics might instead be understood as physical consequences of an underlying medium. The theory is explicitly not intended as an attempt to disprove General Relativity or replace its experimentally confirmed predictions. Rather, it explores the possibility of complementing the existing relativistic description with a deeper mechanical interpretation. General Relativity could therefore remain the correct description of observable spacetime, while the proposed theory searches for a possible physical mechanism underlying that description. This approach is particularly connected to the historical question of whether space, gravity, and physical interactions can ultimately be reduced to concrete physical processes. Albert Einstein himself sought a fundamental and consistent description of nature and was critical of certain purely mathematical interpretations of singularities and nonlocality. The present work therefore does not consider itself an alternative to Einstein, but rather a speculative attempt to investigate a possible physical extension of his geometrical description. Paper 1 develops the fundamental QGP bubble hypothesis and examines its possible cosmological consequences. Paper 2 extends this model by considering the possible role of early black holes as part of a matter cycle between our universe and the proposed external medium. Both papers are presented as hypothetical models and thought experiments. No claim is made that the proposed mechanisms have been experimentally confirmed. Ultimately, the scientific value of the hypothesis would depend on whether it can be developed into a mathematically consistent description and produce testable predictions that can be distinguished from those of existing models. This document contains both the original German version and the English translation (translated with the assistance of AI).