Driving to the steady ground-state superposition assisted by spontaneous emission
Mingfeng Chen, Li-Tuo Shen, Rongxin Chen +1 more
We propose a scheme for preparing a coherent ground-state superposition for an atom through external drivings assisted by spontaneous emission. In the scheme, the dynamics induced by the competition between the spontaneous emission and the external drives contributes to the superposition of the ground states. Compared with schemes based on the stimulated Raman adiabatic passage, such a scheme is more easily implemented because the preparation of special initial states is no longer needed, which simplifies the operation process. Moreover, since spontaneous emission is involved to act as a positive factor, a higher fidelity superposition state is achieved.
Physical Review A•Sep 4, 2015•5 citations