Bremen 2017 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 16: Quantenaspekte der Gravitation und vereinheiltichender Theorien 2

GR 16.5: Talk

Friday, March 17, 2017, 09:50–10:10, SFG 0140

Inter-universal entanglement in a cyclic multiverse model — Salvador Robles-Pérez^1,2, Adam Balcerzak^3,4, Mariusz P. Dabrowski^3,5,4, and •Manuel Krämer³ — ¹Instituto de Física Fundamental, CSIC, Madrid, Spain — ²Estación Ecológica de Biocosmología, Medellín, Spain — ³Instytut Fizyki, Uniwersytet Szczeciński, Szczecin, Poland — ⁴Copernicus Center for Interdisciplinary Studies, Kraków, Poland — ⁵National Centre for Nuclear Research, Otwock, Poland

We study the model of a multiverse consisting of parallel cyclic universes that are classically disconnected, but quantum-mechanically entangled. This model is based on a quantum field theoretical formulation of the Wheeler–DeWitt equation, the so-called third quantization. We calculate the entropy of entanglement and find that it is large at the big-bang and big-crunch singularities as well as at the maxima of the expansion of the parallel universes. The latter hints towards a relation to earlier findings that quantum effects are strong at the turning point of the evolution of a universe.