Abstract The fidelity of the generated Schr?dinger Cat state (SCS) of a single trapped ion in the Lamb--Dicke approximation is discussed. The results show that the fidelity significantly decreases with the values of Lamb--Dicke parameter $\eta$ and coherent state amplitude $\alpha$ increasing. For $\eta$= 0.20 and $\alpha$= 3, the typical values of experimental parameters, the fidelity is rather low (30%). A scheme for generating the SCS is proposed without making the Lamb--Dike approximation in laser--ion interaction, and the fidelity of the generated SCS is about 99% for the typical values of experimental Lamb--Dicke parameters.
Received: 06 July 2008
Revised: 28 July 2008
Accepted manuscript online:
Zhang Miao(张淼), Jia Huan-Yu(贾焕玉), Ji Xiao-Hui(姬晓辉), and Si Kun(司坤) Generation of Schr?dinger cat state of a single trapped cold ion 2009 Chin. Phys. B 18 1049
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.
