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Bouncing cosmologies from quantum gravity condensates

MPS-Authors
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Oriti,  Daniele
Microscopic Quantum Structure & Dynamics of Spacetime, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Sindoni,  Lorenzo
Microscopic Quantum Structure & Dynamics of Spacetime, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Wilson-Ewing,  Edward
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1602.08271.pdf
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Oriti, D., Sindoni, L., & Wilson-Ewing, E. (2017). Bouncing cosmologies from quantum gravity condensates. Classical and Quantum Gravity, 34(4): 04LT01. doi:10.1088/1361-6382/aa549a.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-1824-A
Abstract
We show how the large-scale cosmological dynamics can be obtained from the hydrodynamics of isotropic group field theory condensate states in the Gross-Pitaevskii approximation. The correct Friedmann equations are recovered in the semi-classical limit for some choices of the parameters in the action for the group field theory, and quantum gravity corrections arise in the high-curvature regime causing a bounce which generically resolves the big-bang and big-crunch singularities.