The Generation And Application Of Quantum Entanglement Based On Nv Center And Mtr Resonator Coupling System

Quantum information science is a collection of quantum physics computer science mathematics and so on, which is based on quantum mechanics, using the new feature of quantum physics, combining the demand of information science. With the unique properties of quantum mechanics, quantum information causes wide attention in the world, because it can solve a lot of problems that can’t be solved by classical information. Quantum information usually needs quantum entanglement, so the preparation for quantum entanglement has vital significance in the process of quantum information.Quantum entanglement is a unique physical phenomena, quantum entanglement is widely used in the field of quantum information and quantum communication. There are a lot of physical systems for the preparation of quantum entanglement such as trapped ions, cavity quantum electrodynamics (QED), optical systems, atomic ensembles and so on. Among them, the cavity quantum electrodynamics (QED) is a relative mature system, having the bright application prospect. NV center is a new kind of artificial atom with excellent physical properties. Microtoroidal resonator (MTR) cavity is a special optical microcavity, with a high quality factor and a small effective mode volume. So NV center and microtoroidal resonator (MTR) cavity coupling system has a wide range of application in the field of quantum information processing quantum key distribution and quantum storage. This article mainly involves the following aspects:First of all, we research the characteristics of NV center and microtoroidal resonator (MTR) cavity and then we put forward the NV center and MTR coupling system. Secondly, we put forward the scheme of preparing quantum entangled W state among three NV centers and quantum entangled cluster state among two NV centers. Then we promote them into N particle conditions. Thirdly, we put forward the scheme of preparing quantum hybrid entanglement between NV center and photon. At last, we propose a scheme for entanglement purification based on the model, and then apply it to the process of quantum repeater in order to solve the problem of de-coherence in the long-distance quantum communication.