Cosmological constant in spinfoam cosmology
arXiv:1101.4049 · doi:10.1103/PhysRevD.83.104015
Abstract
We consider a simple modification of the amplitude defining the dynamics of loop quantum gravity, corresponding to the introduction of the cosmological constant, and possibly related to the SL(2,C)q extension of the theory recently considered by Fairbairn-Meusburger and Han. We show that in the context of spinfoam cosmology, this modification yields the de Sitter cosmological solution.
4 pages, 2 figures
References in corpus (20)
- Towards Spinfoam Cosmology
- Anti-deSitter universe dynamics in LQC
- Coherent spin-networks
- 4-dimensional Spin-foam Model with Quantum Lorentz Group
- Quantum deformation of two four-dimensional spin foam models
- Casting Loop Quantum Cosmology in the Spin Foam Paradigm
- Stepping out of Homogeneity in Loop Quantum Cosmology
- The LQC evolution operator of FRW universe with positive cosmological constant
- Loop Quantum Cosmology and Spin Foams
- Why all these prejudices against a constant?
- Cosmological Deformation of Lorentzian Spin Foam Models
- High-order quantum back-reaction and quantum cosmology with a positive cosmological constant
- On the regularization of the constraints algebra of Quantum Gravity in 2+1 dimensions with non-vanishing cosmological constant
- Spinfoams in the holomorphic representation
- Local spinfoam expansion in loop quantum cosmology
- Simple model for quantum general relativity from loop quantum gravity
- Recollapsing quantum cosmologies and the question of entropy
- On the spinfoam expansion in cosmology
- Vertex Expansion for the Bianchi I model
- Coherent states for FLRW space-times in loop quantum gravity
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- Loop Quantum Cosmology: A Status Report
- The Spin Foam Approach to Quantum Gravity
- Introduction to Loop Quantum Cosmology
- Emergent Friedmann dynamics with a quantum bounce from quantum gravity condensates
- Loop quantum gravity: the first twenty five years
- Observational issues in loop quantum cosmology
- Cosmological implications of interacting Group Field Theory models: cyclic Universe and accelerated expansion
- Testing loop quantum cosmology
- Linking covariant and canonical LQG: new solutions to the Euclidean Scalar Constraint
- Group field theory condensate cosmology: An appetizer
- Discrete Gravity Models and Loop Quantum Gravity: a Short Review
- Many-nodes/many-links spinfoam: the homogeneous and isotropic case
- Loop Quantum Gravity
- Classical Setting and Effective Dynamics for Spinfoam Cosmology
- Relational evolution of effectively interacting GFT quantum gravity condensates
- Euclidean three-point function in loop and perturbative gravity
- A Homogeneous Model of Spinfoam Cosmology
- Lorentzian quantum cosmology goes simplicial
- 2-vertex Lorentzian Spin Foam Amplitudes for Dipole Transitions
- Learning about Quantum Gravity with a Couple of Nodes
- Space-time second-quantization effects and the quantum origin of cosmological constant in covariant quantum gravity
- Markov Chain Monte Carlo methods for graph refinement in Spinfoam Cosmology
- Anisotropic Spinfoam Cosmology
- Loop quantum cosmology: relation between theory and observations
- Relational Quantum Cosmology
- Gravity as an emergent phenomenon: a GFT perspective
- Holonomy-flux spinfoam amplitude
- Our Universe from the cosmological constant
- Lorentzian quantum cosmology from effective spin foams
- One vertex spin-foams with the Dipole Cosmology boundary
- The new spin foam models and quantum gravity
- Spinfoam cosmology with the proper vertex amplitude
- Cosmology in Lorentzian Regge calculus: causality violations, massless scalar field and discrete dynamics
- Spin foams
- Dynamics in canonical models of loop quantum gravity
- Aspects of quantum gravity
- Cosmological states in loop quantum gravity on homogeneous graphs
- Asymptotic of Lorentzian Polyhedra Propagator
- Effective geometry of Bell-network states on a dipole graph
- On the dynamics of single-vertex states in quantum-reduced loop gravity
- (2+1) Lorentzian quantum cosmology from spin-foams: opportunities and obstacles for semi-classicality
- The relation between Geometry and Matter in classical and quantum Gravity and Cosmology
- Nonlocal correlations for semiclassical states in loop quantum gravity