Giuseppe, G. diG. diGiuseppeMartin, L.L.MartinPerez-Leija, A.A.Perez-LeijaKeil, R.R.KeilDreisow, F.F.DreisowNolte, S.S.NolteSzameit, A.A.SzameitAbouraddy, A.F.A.F.AbouraddyChristodoulides, D.N.D.N.ChristodoulidesSaleh, B.E.A.B.E.A.Saleh2022-03-042022-03-042013https://publica.fraunhofer.de/handle/publica/23497810.1103/PhysRevLett.110.150503We demonstrate quantum walks of a photon pair in a spatially extended Einstein-Podolsky-Rosen state coupled into an on-chip multiport photonic lattice. By varying the degree of entanglement we observe Anderson localization for pairs in a separable state and Anderson colocalization for pairs in an Einstein-Podolsky-Rosen entangled state. In the former case, each photon localizes independently, while in the latter neither photon localizes, but the pair colocalizes-revealing unexpected survival of the spatial correlations through strong disorder.en620journal article