MG12 - Talk detail |
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Participant |
Battisti, Marco Valerio | |
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Institution |
Centre de Physique Theorique Luminy and ICRA - Case 907 Luminy F-13288 - Marseille - - France | |
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Session |
Talk |
Abstract |
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COT4 |
Semiclassical behavior of the Mixmaster dynamics in the GUP framework |
The Mixmaster Universe is analyzed in a (string-inspired) generalized uncertainty principle framework. The model is studied in the ADM reduced phase space and the anisotropies satisfy a deformed Heisenberg algebra. Three main results are in order. (i) The deformation effects act as opposite of a stiff-matter. (ii) The triangular allowed domain is asymptotically stationary with respect to the point-Universe. (iii) No BKL map can be in general obtained since the Bianchi II model is no longer analytically integrable. |
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SQG2 |
Big-bounce in a Snyder-deformed quantum cosmology |
The Snyder non-commutative geometry is implemented to the Friedmann-Robertson-Walker quantum dynamics. The minisuperspace Heisenberg algebra is here deformed and the modifications are uniquely fixed up to a sign. A non-singular bouncing evolution, \`a la loop quantum cosmology, is then predicted. Notably, the Randall-Sundrum braneworld scenario is also recovered. |