How quantum is the big bang?
arXiv:0805.1192 · doi:10.1103/PhysRevLett.100.221301
Abstract
When quantum gravity is used to discuss the big bang singularity, the most important, though rarely addressed, question is what role genuine quantum degrees of freedom play. Here, complete effective equations are derived for isotropic models with an interacting scalar to all orders in the expansions involved. The resulting coupling terms show that quantum fluctuations do not affect the bounce much. Quantum correlations, however, do have an important role and could even eliminate the bounce. How quantum gravity regularizes the big bang depends crucially on properties of the quantum state.
4 pages
References in corpus (20)
- Background Independent Quantum Gravity: A Status Report
- Quantum Nature of the Big Bang
- Absence of Singularity in Loop Quantum Cosmology
- Quantum Nature of the Big Bang: An Analytical and Numerical Investigation
- Loop Quantum Cosmology
- The Emergent Universe: inflationary cosmology with no singularity
- The Emergent Universe: An Explicit Construction
- Isotropic Loop Quantum Cosmology
- An emergent universe from a loop
- Effective Equations of Motion for Quantum Systems
- Loop cosmological dynamics and dualities with Randall-Sundrum braneworlds
- Loop quantum cosmology and inhomogeneities
- Large scale effective theory for cosmological bounces
- Lattice refining loop quantum cosmology, anisotropic models and stability
- Quantum Gravity and Higher Curvature Actions
- The Einstein static universe in Loop Quantum Cosmology
- Dynamical coherent states and physical solutions of quantum cosmological bounces
- Singularities and Quantum Gravity
- Effective equations for isotropic quantum cosmology including matter
- Singularities in Isotropic Non-Minimal Scalar Field Models
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- Effective Constraints for Relativistic Quantum Systems
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- Some implications of signature-change in cosmological models of loop quantum gravity
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- Loop Quantum Cosmology corrections to inflationary models
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- Recollapsing quantum cosmologies and the question of entropy
- Observational hints on the Big Bounce
- The BKL scenario, infrared renormalization, and quantum cosmology
- The high-density regime of kinetic-dominated loop quantum cosmology
- A no-singularity scenario in loop quantum gravity
- Challenges in recovering a consistent cosmology from the effective dynamics of loop quantum gravity
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- Equivalence of models in loop quantum cosmology and group field theory
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- Loop Quantum Gravity and Cosmology: A dynamical introduction
- Stellar collapse with pressure in effective loop quantum gravity
- Quantum Oscillations Can Prevent the Big Bang Singularity in an Einstein-Dirac Cosmology
- Quantum gravity, space-time structure, and cosmology
- Quantum gravity effects on space-time
- Weyl Curvature Hypothesis in light of Quantum Backreaction at Cosmological Singularities or Bounces
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