اﻧﺘﻘﺎل ﮐﻮاﻧﺘﻮﻣﯽ ﭼﻨﺪ ﻣﺮﺣﻠﻪاﯾﯽ ﺣﺎﻟﺖN -ﮐﯿﻮﺑﯿﺖ ﺑﺎ اﺳﺘﻔﺎده از ﺗﺮﮐﯿﺐ ﺣﺎﻟﺖﻫﺎي GHZ-EPR

Multihop quantum teleportation of N-qubit state by using composite of GHZ-EPR states

اﻧﺘﻘﺎل ﭼﻨﺪ ﻣﺮﺣﻠﻪاي ﯾﮏ روش ﻣﻨﺎﺳﺐ ﺑﺮاي اﻧﺘﻘﺎل اﻃﻼﻋﺎت ﮐﻮاﻧﺘﻮﻣﯽ در ﻓﻮاﺻﻞ دور اﺳﺖ ﮐﻪ درﻫﻢﺗﻨﯿﺪﮔﯽ ﻣﺴﺘﻘﯿﻤﯽ ﺑﯿﻦ ﮔﺮة ﻓﺮﺳﺘﻨﺪه و ﮔﺮة ﮔﯿﺮﻧﺪه وﺟﻮد ﻧﺪارد. در اﯾﻦ ﻣﻘﺎﻟﻪ روش اﻧﺘﻘﺎل ﭼﻨﺪ ﻣﺮﺣﻠﻪاي ﺣﺎﻟﺖ ﺗﮏ ﮐﯿﻮﺑﯿﺘﯽ، دو ﮐﯿﻮﺑﯿﺘﯽ و N-ﮐﯿﻮﺑﯿﺘﯽ ﭘﯿﺸﻨﻬﺎد ﺷﺪه اﺳﺖ، ﮐﻪ در اﯾﻦ روش از ﺗﺮﮐﯿﺐ ﺣﺎﻟﺖ GHZ و ﺣﺎﻟﺖ EPR ﺑﻪ ﻋﻨﻮان ﮐﺎﻧﺎل ﮐﻮاﻧﺘﻮﻣﯽ ﺑﻪ اﺷﺘﺮاك ﮔﺬاﺷﺘﻪ ﺷﺪه ﺑﯿﻦ دو ﮔﺮة ﻣﺠﺎور، اﺳﺘﻔﺎده ﻣﯽﺷﻮد. در اﯾﻦ روش ﮔﺮة ﻣﺒﺪأ و ﮔﺮهﻫﺎي واﺳﻄﮥ ﻫﻢزﻣﺎن و ﻫﻢارز ﯾﮑﺪﯾﮕﺮ ﻣﯽﺗﻮاﻧﻨﺪ اﻧﺪازهﮔﯿﺮيﻫﺎي ﺧﻮد را اﻧﺠﺎم دﻫﻨﺪ و ﻧﺘﯿﺠﮥ اﻧﺪازهﮔﯿﺮي را ﺑﻪ ﮔﺮة ﻣﻘﺼﺪ اﻋﻼم ﮐﻨﻨﺪ، ﺑﻨﺎﺑﺮاﯾﻦ ﺳﺮﻋﺖ اﻧﺘﻘﺎل اﻃﻼﻋﺎت در اﯾﻦ روش ﻧﺴﺒﺖ ﺑﻪ روش اﻧﺘﻘﺎل ﻣﺮﺣﻠﻪ ﺑﻪ ﻣﺮﺣﻠﮥ ﺑﺎﻻﺗﺮ اﺳﺖ. در ﭘﺎﯾﺎن ﺑﺎزدة اﯾﻦ ﭘﺮوﺗﮑﻞ ﻧﯿﺰ ﻣﺤﺎﺳﺒﻪ ﺷﺪه اﺳﺖ. اﯾﻦ روش ﺑﺮاي اﻧﺘﻘﺎل اﻃﻼﻋﺎت در ﺷﺒﮑﻪﻫﺎي ارﺗﺒﺎﻃﯽ ﻣﻨﺎﺳﺐ اﺳﺖ.

The multihop teleportation is a useful scheme for quantum teleportation in long-distance, that there is no direct entanglement between a source node and a destination node. In this paper, multihop teleportation of single-qubit, two-qubit, and N-qubit states are presented by using the composition of the GHZ state and EPR state as a shared quantum channel between two adjacent nodes. In this scheme, the source node and intermediate nodes can make measurements simultaneously and send the measurement results to the destination node in parallelism, so that the transmission speed increases compared with the hop-by-hop transmission. Finally, the efficiency of this method is calculated. This scheme is suitable for transferring information in communication networks.