Using a quantum dot system to realize perfect state transfer

作者：Li Ji; Wu Shi Hai; Zhang Wen Wen; Xi Xiao Qiang^*

来源：Chinese Physics B, 2011, 20(10): 100308.

DOI：10.1088/1674-1056/20/10/100308

• quantum communication
• spin chain
• quantum dot

There are some disadvantages to Nikolopoulos et al.'s protocol [Nikolopoulos G M, Petrosyan D and Lambropoulos P 2004 Europhys. Lett. 65 297] where a quantum dot system is used to realize quantum communication. To overcome these disadvantages, we propose a protocol that uses a quantum dot array to construct a four-qubit spin chain to realize perfect quantum state transfer (PQST). First, we calculate the interaction relation for PQST in the spin chain. Second, we review the interaction between the quantum dots in the Heitler-London approach. Third, we present a detailed program for designing the proper parameters of a quantum dot array to realize PQST.

• 出版日期2011-10
• 单位西安邮电大学