The interferometry of single-photon pulses has been used to implement quantum technology systems, like quantum key distribution, interaction-free measurement and some other quantum communication protocols. In most of these implementations, Mach-Zehnder, Michelson and Fabry-Perot interferometers are the most used. In this work we present optical setups for interaction-free measurement, quantum key distribution and quantum secret sharing using the Sagnac interferometer. The proposed setups are described as well the quantum protocols using them are explained.
@article{arxiv.0706.1228,
title = {Quantum information technology with Sagnac interferometer: Interaction-free measurement, quantum key distribution and quantum secret sharing},
author = {Wellington Alves de Brito and Rubens Viana Ramos},
journal= {arXiv preprint arXiv:0706.1228},
year = {2009}
}