Generation Of Multi-Particles Cluster State With The Coupling System Of Quantum Dots And Optical Cavity

Quantum entanglement plays a critical role in the field of quantum informa-tion processing and has been widely applied to quantum communication as the most essential physical resource. It is a crucial quantum resource with respect to various quantum information processing, such as quantum teleportation, quantum secret sharing, quantum dense coding and so on. Therefore multi-particle entan-gled state preparation has the vital significance. The semiconductor quantum dot-s (QDs) system in solid state system has many advantages of integratability and scalablity. It is most likely to achieve one of the physical system of quantum infor-mation processing, becoming a research hotspot in quantum information processing in recent years.In this dissertation, we propose a scheme only with one-step to generate multi-particle cluster states using the QDs embedded in the double-sided microcavities. The main research contents as follows:we propose the schemes of preparation multi-particle entanglement based on QD-cavity coupling system, including four-particle cluster states and six-particle cluster states. Using the double-sided microcavities, linear optical element and basing on the auxiliary photon detection, we realize the entangled state preparation finally. The analysis shows that scheme can achieve the optimal fidelity and the probability of success and further deepens the research of quantum information processing in the hybrid quantum systems. It provides the reference for quantum information processing in solid-state QD system.