The main work done along my PhD is related to entangled states composed of a single photon. This state generation requires fewer resources when compared to other entangled states generation. Moreover, it's easily scaled to multipartite scenarios and is also robust to setup inefficiencies of quantum repeaters. Our first work with this state was related to its generation and detection, encouraging us to pursue more evidences that this state is useful for quantum communication. The following project was related to demonstrate how this state can be used in a semi-device independent scenario. Our last project regards the use of a heralded photon amplifier that is intended to compensate the loss that is present during state distribution. All these advances makes us confident that this kind of state can find its application in quantum communication, and also encourage us to pursue new practical implementations such as device independent quantum key distribution.