Abstract In this paper, we investigate the quantum entanglement in a two-dimensional ion trap system. We discuss the quantum entanglement between the ion and phonons by using reduced entropy, and that between two degrees of freedom of the vibrational motion along x and y directions by using quantum relative entropy. We discuss also the influence of initial state of the system on the quantum entanglement and the relation between two entanglements in the trapped ion system.
Received: 21 May 2002
Revised: 09 December 2002
Accepted manuscript online:
(Mechanical effects of light on atoms, molecules, and ions)
Fund: Projects supported by the National Natural Science Foundation of China (Grant No 19874020), the Natural Science Foundation of Hunan province (Grant No 01JJY3030) and the Ministry of Education, China.
Cite this article:
Wang Cheng-Zhi (王成志), Fang Mao-Fa (方卯发) Quantum entanglement in a two-dimensional ion trap 2003 Chinese Physics 12 287
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.
