The Production And Application Of Quantum Entanglement Source

Quantum entanglement is the most representative feature of quantummechanics to classical mechanics. Quantum entanglement is thedelocalization, non-classical strong correlation among multiple quantumsystem. It has been developed for nearly one hundred years and a lot ofmethods of production and applications have been proposed. The mainmethods of production are the following: natural parametric down-conversion and quasi-phase matching technology based on thesecond-order nonlinearity of nonlinear optical crystal; four wave mixingbased on third order nonlinear effect of optical fiber; entanglement sourceof compressed state based on optical parametric. With the ability ofpreparation of quantum entanglement source, the application of quantumentanglement developed quickly, such as quantum teleportation,entanglement swapping, quantum key distribution and quantum densecoding in the area of communication, and other area such as quantumcomputer, quantum imaging, quantum ranging and quantum clocksynchronization. The paper introduces three parts of content, one is thebackground knowledge of quantum entanglement: the development ofquantum entanglement and the basic knowledge of physics, and theproduction application of quantum entanglement. The second is theexperiment of quantum entanglement source based on BBO crystal,including the theory, the process and the result of the experiment. Thethird is an application of quantum entanglement, quantum anonymousvoting for continuous variable. The parts of second and third are themain parts, the second is the achievement of experiment on theproduction of entanglement, and the third is the achievement of theory onthe application.The experiment including five parts: design crystal, purchase equipment, platform, measure data and analysis results. We use Bellinequality measuring our data and proving it entangled source.Quantum anonymous voting for continuous variable is based on thediscrete protocol which has difficulty in detecting. Voting protocolintroduces three solutions: contrast vote, anonymous voting and quantumanonymous voting. Anonymous voting is divided into two partsaccording to the number of candidates, two or multiple. In the end of theagreement we gave the experiment scheme of quantum anonymousvoting for continuous variable.