中国物理B ›› 2007, Vol. 16 ›› Issue (6): 1566-1569.doi: 10.1088/1009-1963/16/6/012
方卯发1, 蔡建武2, 廖湘萍2, 郑小娟3
Cai Jian-Wu(蔡建武)a)b), Fang Mao-Fa(方卯发)a)† Zheng Xiao-Juan(郑小娟)a)c), and Liao Xiang-Ping(廖湘萍)a)b)
摘要: We propose a scheme to implement two-qubit controlled quantum phase gate(CQPG) via a single trapped two-level ion located in the standing wave field of a quantum cavity, in which the trap works beyond the Lamb--Dicke limit. When the light field is resonant with the atomic transition $|g\rangle\leftrightarrow|e\rangle$ of the ion located at the antinode of the standing wave, we can perform CQPG between the internal and external states of the trapped ion; while the frequency of the light field is chosen to be resonant with the first red sideband of the collective vibrational mode of the ion located at the node of the standing wave, we can perform CQPG between the cavity mode and the collective vibrational mode of the trapped ion. Neither the Lamb--Dicke approximation nor the assistant classical laser is needed. Also we can generate a GHZ state if assisted with a classical laser.
中图分类号: (Quantum computation architectures and implementations)