Abstract:
The origin of the Universe is being studied as an jump of an initial scalar field from a pre-universe. The scalar field is described by a cubic nonlinear multidimensional Klein-Gordon equation. The approximate solutions are presented. They describe scalar fields, scalar potentials and a weakly oscillating pre-Universe. At any moment the pre-Universe gives a birth to the billions of ‘seeds’ of rapidly evolving Universes. One of them accidentally formed our Universe during some quantum action. The strongly-nonlinear model of the eruption of the Universe from the pre-universe is developed in which all elements fit together in a tight and natural way. The origin of the particles, matter and dark energy is directly related to the strongly-nonlinear properties of the quantum scalar fields and the resonant interaction and oscillations of them. The initial energy of the field is converted into particles during the eruption. They could work like a scaffold creating the four-dimensional spacetime. Some highly energetic particles could be very stable. Perhaps, these particles had been stable for billions of years before they begun to decay. This process can determine the law of expansion the modern Universe. On the other hand, these particles may correspond to the dark matter. However, the bulk of the initial energy remained unused. Perhaps, this energy was locked into the formed four-dimensional spacetime. This energy may correspond to the dark energy. The Universe is considered as a wave system. A scenario is developed, when the Universe begins in a state that differs greatly from that of the theories of the Big Bang and the inflation. The Universe was born having a finite volume. We believe that the coherent model for the emergence and initial evolution of the Universe is presented.