Experimental observation of superdiffusive transport in random dimer lattices

Uta Naether, M.I. Molina, R.A. Vicencio and Alexander Szameit
NEW JOURNAL OF PHYSICS 15 (2013)

ABSTRACT

We experimentally observe anomalous wavepacket evolution in a
realization of a one-dimensional finite binary Anderson model in the presence
of short-range correlations. To this end, we employ weakly-coupled optical
waveguides with propagation constants e1 and e2. The correlations enforce the
creation of dimers, i.e. two adjacent waveguides with the same “, randomly
placed along the lattice. A transition from a ballistic to a superdiffusive
wavepacket expansion and, eventually, to localization is observed as the contrast
between the two propagation constants increases.

DOI: http://dx.doi.org/



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