Physics – Quantum Physics
Scientific paper
2001-11-07
Physics
Quantum Physics
15 Pages, 3 Figures
Scientific paper
10.1140/epjd/e20020043
The Raman interaction of a trapped ultracold ion with two travelling wave lasers is studied analytically with series solutions, in the absence of the rotating wave approximation (RWA) and the restriction of both the Lamb-Dicke limit and the weak excitation regime. The comparison is made between our solutions and those under the RWA to demonstrate the validity region of the RWA. As a practical example, the preparation of Schr\"odinger-cat states with our solutions is proposed beyond the weak excitation regime.
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