Spinfoam Cosmology: quantum cosmology from the full theory
arXiv:1011.4705 · doi:10.1088/1742-6596/314/1/012049
Abstract
Quantum cosmology is usually studied quantizing symmetry-reduced variables. Is it possible, instead, to define quantum cosmology starting from the full quantum gravity theory? In Loop Quantum Gravity (LQG), it is possible to cut the degrees of freedom in a suitable way, in order to define a cosmological model. Such a model provides a tool for describing general fluctuations of the quantum geometry at the bounce that replaces the initial singularity. I focus on its simplest version, a "dipole" formed by two tetrahedra. This has been shown to describe a universe with anisotropic and inhomogenous degrees of freedom. Its dynamics can be given using the spinfoam formalism. I briefly review the present state of this approach.
4 pages, jpconf.cls, to appear in the Proceedings of Spanish Relativity Meeting 2010 (ERE2010), Granada, Spain
References in corpus (10)
- Quantum Nature of the Big Bang: Improved dynamics
- LQG vertex with finite Immirzi parameter
- A new spinfoam vertex for quantum gravity
- A New Spin Foam Model for 4d Gravity
- Are loop quantum cosmos never singular?
- Loop Quantum Cosmology: An Overview
- Towards Spinfoam Cosmology
- Is loop quantization in cosmology unique?
- Singularity Resolution in Loop Quantum Cosmology: A Brief Overview
- Stepping out of Homogeneity in Loop Quantum Cosmology
Cited by in corpus (14)
- The Spin Foam Approach to Quantum Gravity
- Introduction to Loop Quantum Cosmology
- Cosmological implications of interacting Group Field Theory models: cyclic Universe and accelerated expansion
- Quantum cosmology from quantum gravity condensates: cosmological variables and lattice-refined dynamics
- Many-nodes/many-links spinfoam: the homogeneous and isotropic case
- Quantum-Reduced Loop-Gravity: Relation with the Full Theory
- Backreaction in Cosmology
- On the Expansions in Spin Foam Cosmology
- Learning about Quantum Gravity with a Couple of Nodes
- Embedding loop quantum cosmology without piecewise linearity
- Markov Chain Monte Carlo methods for graph refinement in Spinfoam Cosmology
- Relational Quantum Cosmology
- Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
- Minisuperspace model of compact phase space gravity