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)
a College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; b Department of Physics Science and electronics, Zhuzhou Teacher's College, Zhuzhou 412007, China; c School of Physics Science and Technology, Central South University, Changsha 410082, China
Abstract 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.
Received: 30 June 2006
Revised: 28 December 2006
Accepted manuscript online:
PACS:
03.67.Lx
(Quantum computation architectures and implementations)
Fund: Project
supported by the National Natural Science Foundation of
China (Grant No~10374025).
Cite this article:
Cai Jian-Wu(蔡建武), Fang Mao-Fa(方卯发) Zheng Xiao-Juan(郑小娟), and Liao Xiang-Ping(廖湘萍) A scheme of quantum phase gate for trapped ion 2007 Chinese Physics 16 1566
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
