Absolute continuity, Lyapunov exponents and rigidity I: geodesic flows
Journal of the European Mathematical Society, Tome 17 (2015) no. 6, pp. 1435-1462.

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We consider volume-preserving perturbations of the time-one map of the geodesic flow of a compact surface with negative curvature. We show that if the Liouville measure has Lebesgue disintegration along the center foliation then the perturbation is itself the time-one map of a smooth volume-preserving flow, and that otherwise the disintegration is necessarily atomic.
DOI : 10.4171/jems/534
Classification : 37-XX
Keywords: Lyapunov exponent, geodesic flow, partial hyperbolicity, disintegration, absolute continuity, rigidity
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     title = {Absolute continuity, {Lyapunov} exponents and rigidity {I:} geodesic flows},
     journal = {Journal of the European Mathematical Society},
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Artur Avila; Marcelo Viana; Amie Wilkinson. Absolute continuity, Lyapunov exponents and rigidity I: geodesic flows. Journal of the European Mathematical Society, Tome 17 (2015) no. 6, pp. 1435-1462. doi : 10.4171/jems/534. http://geodesic.mathdoc.fr/articles/10.4171/jems/534/

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