01718nas a2200181 4500008003900000245011900039210006900158260001100227490000600238520103200244100002001276700002201296700001801318700002401336700002201360700002101382856013301403 2014 d00aInterface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information0 aInterface between path and orbital angular momentum entanglement c7/20140 v53 aPhotonics has become a mature field of quantum information science, where integrated optical circuits offer a way to scale the complexity of the setup as well as the dimensionality of the quantum state. On photonic chips, paths are the natural way to encode information. To distribute those high-dimensional quantum states over large distances, transverse spatial modes, like orbital angular momentum (OAM) possessing Laguerre Gauss modes, are favourable as flying information carriers. Here we demonstrate a quantum interface between these two vibrant photonic fields. We create three-dimensional path entanglement between two photons in a non-linear crystal and use a mode sorter as the quantum interface to transfer the entanglement to the OAM degree of freedom. Thus our results show a novel, flexible way to create high-dimensional spatial mode entanglement. Moreover, they pave the way to implement broad complex quantum networks where high-dimensionally entangled states could be distributed over distant photonic chips.1 aFickler, Robert1 aLapkiewicz, Radek1 aHuber, Marcus1 aLavery, Martin, P J1 aPadgett, Miles, J1 aZeilinger, Anton uhttp://grupsderecerca.uab.cat/giq/publications/interface-between-path-and-orbital-angular-momentum-entanglement-high-dimensional