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Piecewise contracting maps on the interval: Hausdorff dimension, entropy and attractors
We consider the attractor of a piecewise contracting map
defined on a compact interval. If is injective, we show that it is possible
to estimate the topological entropy of (according to Bowen's formula) and
the Hausdorff dimension of via the complexity associated with the
orbits of the system. Specifically, we prove that both numbers are zero.Comment: 8 page
Status of the ANAIS Dark Matter Project at the Canfranc Underground Laboratory
The ANAIS experiment aims at the confirmation of the DAMA/LIBRA signal. A
detailed analysis of two NaI(Tl) crystals of 12.5 kg each grown by Alpha
Spectra will be shown: effective threshold at 1 keVee is at reach thanks to
outstanding light collection and robust PMT noise filtering protocols and the
measured background is well understood down to 3 keVee, having quantified K, U
and Th content and cosmogenic activation in the crystals. A new detector was
installed in Canfranc in March 2015 together with the two previous modules and
preliminary characterization results will be presented. Finally, the status and
expected sensitivity of the full experiment with 112 kg will be reviewed.Comment: Contributed to the 11th Patras Workshop on Axions, WIMPs and WISPs,
Zaragoza, June 22 to 26, 201
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