2017/08/13 by Salvador Robles-Pérez, Salvador J. Robles-Pérez
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Friedmann equations #Mathematical physics #Metric expansion of space #Observable #Perturbation (astronomy) #Physics #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum entanglement #Quantum mechanics #Scalar (mathematics) #Scalar field #Scale factor (cosmology) #Spacetime #Theoretical physics #Universe #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.97.066018
published as Phys. Rev. D 97, 066018 (2018) · 10 pages
arxiv created 2017/08/13 · openalex created_date 2017/08/31 · openalex publication_date 2018/03/21 · arxiv updated 2018/03/28 · openalex updated_date 2026/08/05
In this paper, the model of a multiverse made up of universes that are created in entangled pairs that conserve the total momentum conjugated to the scale factor is presented. For the background spacetime, assumed is a Friedmann-Robertson-Walker metric with a scalar field with mass m minimally coupled to gravity. For the fields that propagate in the entangled spacetimes, the perturbations of the spacetime and the scalar field, whose quantum states become entangled too, are considered. They turn out to be in a quasithermal state, and the corresponding thermodynamical magnitudes are computed. Three observables are expected to be caused by the creation of the universes in entangled pairs: a modification of the Friedmann equation because of the entanglement of the spacetimes, a modification of the effective value of the potential of the scalar field by the backreaction of the perturbation modes, and a modification of the spectrum of fluctuations because the thermal distribution is induced by the entanglement of the partner universes. The later would be a distinctive feature of the creation of universes in entangled pairs.