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Article Dans Une Revue Physical Review D Année : 2014

Why are the effective equations of loop quantum cosmology so accurate?

Résumé

We point out that the relative Heisenberg uncertainty relations vanish for non-compact spaces in homogeneous loop quantum cosmology. As a consequence, for sharply peaked states quantum fluctuations in the scale factor never become important, even near the bounce point. This shows why quantum back-reaction effects remain negligible and explains the surprising accuracy of the effective equations in describing the dynamics of sharply peaked wave packets. This also underlines the fact that minisuperspace models ---where it is global variables that are quantized--- do not capture the local quantum fluctuations of the geometry.

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hal-01111680 , version 1 (30-01-2015)

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Carlo Rovelli, Edward Wilson-Ewing. Why are the effective equations of loop quantum cosmology so accurate?. Physical Review D, 2014, 90, pp.023538. ⟨hal-01111680⟩
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