Success Probability of Optical Quantum CNOT Gate Based on Probabilistic Single Photon Sources

The main objective of this work is to study the impact of the probabilistic Single Photon Source (SPS) on the functioning of the quantum logic gates. To this end, three SPSs realizations are taken into consideration: they are the Attenuated Laser (AL), the Heralded Single Photon Source (HSPS) and the Enhanced Single Photon Source (ESPS). We start by modeling the ESPS and focusing on the conditions allowing to obtain a strong coupling regime between the Quantum Dot (QD) and suitable cavity. To enhance a fundamental mode emitting at a specific wavelength, we compare the performances by considering the quality factor Q and the effective volume V. Our comparative study is based on three different resonant micro-cavities, which are the microdisk, the micro-gear and the 2D photonic crystal (PC) microcavity. In a second thrust, we present numerical simulation to illustrate the effect of each of the SPSs on the success probability of a non-deterministic all optical CNOT gate.