In the last section , we show how entangled states are used in quantum dense coding , quantum cryptography and quantum teleportation . a new valuable scheme based on linear optical elements about teleportation of two - photon and multi - photon entangled states also has been proposed in this section . in this scheme t he probability of the successful teleportation is 50 % , which is optimal 量子糾纏在量子信息中的應(yīng)用這一章中,我們將首先分別介紹量子糾纏在量子密集編碼,量子密鑰分布,量子隱形傳態(tài)中的應(yīng)用,然后提出一種利用線性光學(xué)方法實(shí)現(xiàn)糾纏態(tài)的隱形傳送方案,此方案的成功率為50 ,這也是目前為止最佳的成功幾率。