摘要
提出利用单个三粒子最大Greenberger-Horne-Zeilinger(GHZ)态或两个Einstein-Podolsky-Rosen(EPR)态作为量子信道确定性隐形传送任意三粒子GHZ态的两个方案,并将方案推广至隐形传送任意n(n≥4)粒子GHZ态的情况.讨论了量子信道受噪声影响时隐形传态的保真度.研究发现,当作为量子信道的单个三粒子最大GHZ态受到噪声影响时,隐形传态的保真度仅与量子信道的纠缠度有关,而当作为量子信道的两个EPR态受到噪声影响时,隐形传态的保真度不仅与量子信道的纠缠度有关,还与待传送态的纠缠度有关.所提出的方案具有节省量子信道纠缠资源的特点.
Two schemes, using respectively the single three-particle maximal Greenberger-Horne-Zeilinger （GHZ） state and the two Einstein-Podolsky-Rosen （EPR） states as quantum channels, for deterministic telepertation of arbitrary three-particle GHZ state are proposed. These schemes are also generalized into the case of telepertation of arbitrary n-particle GHZ state （ n ≥4）. The fidelity of telepertation when the quantum channels are affected by noise is discussed. It is found that when using single threeparticle GHZ state which is affected by noise as quantum channel, the fidelity of telepertation is only related to the entanglement of the channel. However, when using two EPR states which is affected by noise as quantum channels, the fidelity of telepertation is related to the entanglement of both the channels and the unknown state to be delivered. Compared with previous proposals, our schemes require a reduced number of entangled states as quantum channels to achieve the same task.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第4期1888-1894,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10574060)
山东省自然科学基金(批准号:Y2004A09)资助的课题.~~
