Research On Quantum Storage In Quantum Communication

Quantum storage technology is the core technology of quantum communication，which is important to quantum information processing and information storage inquantum logic gate， transformation and control the process of quantumcommunication. Quantum storage is the core problem in the study of quantumrepeater. That measure the performance of quantum memory contains storageefficiency， storage time and reading efficiency， etc. How to improve the storagetime is crucial. The storage time of Single photon entangled memory is inmilliseconds scale on trail. Quantum storage mainly has cold atomic gas and solid.Cold atomic gas scheme has simple level structure， the advantage of highsignal-to-noise ratio， but bad for system integration and extension in the future.Solid solution has the advantage of high integration， but its energy level structure iscomplex， low signal noise ratio (SNR). It will be a long time of study and hard workto implement practical quantum memory.In quantum informatics， quantum states of microscopic particles is used to codeinformation， once the quantization of information， the quantum mechanics theoryhas evolved into the quantum information theory foundation. In recent years，quantum communication and quantum computing has developed rapidly in theoryand experiment. In the aspect of the theory of quantum communication， physicallyunable to decipher the quantum cryptography， quantum states， quantum densecoding，quantum secure direct communication，quantum remote state preparation，terminal open contact transmission， such as the new way of communication havebeen put forward; Quantum key distribution and quantum encryption of local areanetwork have been realized in experiments， the using of the optical deviceimplemented the photon polarization contact transmission. The quantum state has thespecial properties that classical physics states hasn’t， so it has great superiority to usequantum state encoding information in communication and digital computing.Quantum communication about quantum storage was further studied in this paper. The work details as below:The first chapter is introduction， introduces researchand development results of the basic knowledge of quantum communication andquantum storage technology.The second chapter reviews about some basic conceptsof quantum storage， it also summarizes some latest progress about quantummemory.The third chapter， Quantum memory is used to integrate quantum repeaterthat part of the remote transmission scheme of quantum information with quantumcomputer network， the quantum memory allows an exchange high-fidelity status，we studied quantum in quantum computer storage structure of the system and somesimple programming that closely related to the quantum storage.The fourth chapter，according the given binary image information is too single， we try to put forward anew quantum state eight particles of color image storage solutions in this chapter，first we found the quantum states of the huge storage capacity through simplecomparison and analysis， then combined with a quantum search algorithm，analyzed the storage method of the color image that show great superiority in theimage reconstruction， which a classic color image storage cannot be compared.Thefifth chapter， we focus to the practical application of the quantum memory imagefeedback. We put forward non destructive quantum interactions， transparentelectromagnetic induction scheme based on atomic coherence effects and Ramanscattering process at the atomic level to obtain quantum storage based on atomicensemble， which have applied to quantum store and contact transmission ofsingle-mode demonstration.Finally， we make a brief review of the main content of this paper， and makeoutlook for further research on the horizon.