Implementation Of Controlled-Not Gate And Quantum Cloning With The Coupling System Of Quantum Dots And

Quantum information science is a subject based on quantum mechanics and information processing technology. There are many systems for realizing quantum information processing, but solid state system is one of the most promising physical systems. Therefore, the research in quantum dot(QD) system of quantum informa-tion processing has become the hot topic in recent years. In this dissertation the implementations’quantum controlled-not gate, quantum cloning and telecloning are proposed with the coupling system of quantum dots and optical cavity. The main research contents as follows:We propose the schemes of implement quantum controlled-not gate in weak coupling regimes. Even if consider the influence of cavity decay, frequency detuning and cavity leakage, the fidelity of these schemes can also approach to86.67%.Using the proposed controlled-not gate, we propose the implementation for quantum real state cloning. We can achieve the optimal fidelity of the real state cloning by taking the appropriate values and the probability of success is1. We may implement the telecloning combined the teleportation and real state cloning.The above works deepen and enrich the researches on quantum information pro-cessing in hybrid quantum information system, it provides the reference for quantum information processing solid-state QD system.