Efficient single photon sources, such as semiconductor quantum dots in micro-cavities, attracted attention not only for their fundamental properties, but also for wide use as resources of qubits...Show moreEfficient single photon sources, such as semiconductor quantum dots in micro-cavities, attracted attention not only for their fundamental properties, but also for wide use as resources of qubits for quantum communication and quantum computing. In this thesis, we study and optically characterize a device with QDs embedded in micro-cavities. By fitting the semi-classical model which describes QD-cavity interaction, we conclude that we observe trion transitions. A study of the second-order correlation function of one transition shows that it works as efficient single-photon source.Show less
Cluster states are a viable resource for quantum computing where information is stored in these states and one single-qubit measurement is performed at a time. In order to generate such states, we...Show moreCluster states are a viable resource for quantum computing where information is stored in these states and one single-qubit measurement is performed at a time. In order to generate such states, we use the quanta of light - photons - as our qubits. We generate them from a quantum dot in a microcavity which serves us as a deterministic single photon source. We explore a method of generating cluster states by entangling these photons with the means of linear optical elements and post-selection. We develop a theoretical model and show that it is in an agreement with our experimental data with single photons. From this agreement, we conclude that the cluster states arise in the experimental setup and the entanglement between the photons can be confirmed to be present with further analysis using our hypothesis and possibly even the quantum state tomography in the future.Show less
