Quantum cosmology from quantum gravity condensates: cosmological variables and lattice-refined dynamics
Quantum cosmology from quantum gravity condensates: cosmological variables and lattice-refined dynamics
复制标题
来自量子引力凝聚的量子宇宙学:宇宙学变量和晶格细化动力学
DOI:
--
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
D. Oriti
中科院分区:
文献类型:
--
作者:
Steffen Gielen;D. Oriti
In the context of group field theory condensate cosmology, we clarify the extraction of cosmological variables from the microscopic quantum gravity degrees of freedom. We show that an important implication of the second quantized formalism is the dependence of cosmological variables and equations on the quantum gravitational atomic number N (number of spin network vertices/elementary simplices). We clarify the relation of the effective cosmological equations with loop quantum cosmology, understood as an effective (hydrodynamic-like) approximation of a more fundamental quantum gravity theory. By doing so, we provide a fundamental basis to the idea of lattice refinement, showing the dependence of the effective cosmological connection on N, and hence indirectly on the scale factor. Our results open a new arena for exploring effective cosmological dynamics, as this depends crucially on the new observable N, which is entirely of quantum gravitational origin.
影响因子:
8.6
作者:
Ade, P. A. R.;Aikin, R. W.;Yoon, K. W.
通讯作者:
Yoon, K. W.