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Spinfoam Cosmology: quantum cosmology from the full theory · Around

2010

Spinfoam Cosmology: quantum cosmology from the full theory

Vidotto, Francesca

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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.

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Rovelli C 2010 ( Preprint
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Ashtekar A, Pawlowski T and Singh P 2006 Phys. Rev
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Livine E R and Speziale S 2007 Phys. Rev
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Rovelli C and Vidotto F 2008 Class.Quant.Grav
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Engle J, Livine E, Pereira R and Rovelli C 2008 Nucl. Phys
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Freidel L and Krasnov K 2008 Class. Quant. Grav
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