Moir\'e patterns in quantum images
  We observed moir\'e fringes in spatial quantum correlations between twin photons generated by parametric down-conversion. Spatially periodic structures were nonlocally superposed giving rise to beat frequencies typical of moir\'e patterns. This result brings interesting perspectives regarding metrological applications of such a quantum optical setup. 
J.A.O. Huguenin, M.P. Almeida, P.H. Souto Ribeiro, A.Z. Khoury