Complete orbital angular momentum Bell-state measurement and superdense coding
Abstract
Quantum protocols require access to large-scale entangled quantum states, due to the requirement of channel capacity. As a promising candidate, the high-dimensional orbital angular momentum (OAM) entangled states have been implemented, but only one of four OAM Bell states in each individual subspace can be distinguished. Here we demonstrate the first realization of complete OAM Bell-state measurement (OAM-BSM) in an individual subspace, by seeking the suitable unitary matrix performable using only linear optics and breaking the degeneracy of four OAM Bell states in ancillary polarization dimension. We further realize the superdense coding via our complete OAMBSM with the average success probability of ~82% and the channel capacity of ~1.1(4) bits. This work opens the window for increasing the channel capacity and extending the applications of OAM quantum states in quantum information in future.
Cite
@article{arxiv.1709.03770,
title = {Complete orbital angular momentum Bell-state measurement and superdense coding},
author = {Ling-Jun Kong and Rui Liu and Zhou-Xiang Wang and Yu Si and Wen-Rong Qi and Shuang-Yin Huang and Chenghou Tu and Yongnan Li and Wei Hu and Fei Xu and Yan-Qing Lu and Hui-Tian Wang},
journal= {arXiv preprint arXiv:1709.03770},
year = {2017}
}
Comments
6 pages, 4 figures