Effective Theories of Quantum Cosmology
arXiv:1212.5874
Abstract
We introduce two possible ways of defining effective constraints of quantum systems and applied this effective constraint method to models of WDW Quantum Cosmology and Loop Quantum Cosmology. We analyze effective Hamiltonian constraint on both second and third order and calculate Hubble parameter as well as modified Friedmann equation of each model. Then we compare with a special case using coherent state. It shows that this method is reasonable and as before the classical Big Bang singularity is replaced by a quantum bounce in Loop Quantum Cosmology.
arXiv comment17 pages. arXiv admin note: substantial text overlap with arXiv:0804.3365, arXiv:0906.1772 by other authors
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