Perumangatt, ChithrabhanuChithrabhanuPerumangattLal, NijilNijilLalAnwar, AliAliAnwarGangi Reddy, SallaSallaGangi ReddySingh, R. P.R. P.Singh2025-08-302025-08-302017-06-1510.1016/j.physleta.2017.04.0022-s2.0-85017412088https://d8.irins.org/handle/IITG2025/22458We address the possibility of using even/odd states of orbital angular momentum (OAM) of photons for the quantum information tasks. Single photon qubit states and two photon entangled states in even/odd basis of OAM are considered. We present a method for the tomography and general projective measurement in even/odd basis. With the general projective measurement, we show the Bell violation and quantum cryptography with Bell's inequality. We also describe hyper and hybrid entanglement of even/odd OAM states along with polarization, which can be applied in the implementation of quantum protocols like super dense coding.falseEven and odd | Hyper-entanglement | Orbital angular momentum | TomographyArticlehttps://arxiv.org/pdf/1607.064221858-186515 June 201721arJournal21