The atomic kicked rotor is a paradigm for studying quantum chaos and Anderson localization
phenomena in atomic systems.

Carefully engineering the kicked rotor Hamiltonian [1] allowed us
to experimentally investigate the coherent nature of the interference paths which

represent the building blocks of the localization. In particular, we observed the

“enhanced return to the origin"
phenomenon, a manifestation of weak localisation closely related to the

“coherent back scattering".
Moreover, more subtile interference mechanisms lead to the so-called “coherent forward
scattering" which has been theoretically predicted recently [2]. Under certain conditions,

this can represent a genuine signature of Anderson (strong) localisation. We will present

the first experimental evidence of the observation of “coherent forward scattering" and

discuss two key distinctive features: the characteristic timescale and robustness

with respect to time-reversalsymetry
breaking.
[1] C. Tian, A. Kamenev, and A. Larkin, Phys. Rev. B 72, 045108 (2005).
[2] T. Karpiuk, N. Cherroret, K. Lee, B. Gremaud, C. A.Muller, and C.Miniatura, Phys. Rev. Lett.
109, 190601 (2012).