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Bouncing cosmologies from quantum gravity condensates
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DOI：10.1088/1361-6382/aa549a.png)
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Abstract
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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 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.
Keywords:
loop quantum gravity
group field theory
cosmology
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