Coherence generation and population transfer by stimulated Raman adiabatic passage and π pulse in a four-level ladder system.

@article{Zhang2011CoherenceGA,
  title={Coherence generation and population transfer by stimulated Raman adiabatic passage and π pulse in a four-level ladder system.},
  author={Bing Zhang and Jin-hui Wu and Xi-Zhang Yan and Lei Wang and Xiao-jun Zhang and Jin-yue Gao},
  journal={Optics express},
  year={2011},
  volume={19 13},
  pages={12000-7}
}
We propose a new scheme for achieving the complete population transfer and the optimal coherence generation between the ground state and the Rydberg state in a four-level ladder system by combining the STIRAP or fractional STIRAP technique and the π pulse technique. We consider, in particular, two different situations where spontaneous emission from the two highest states are neglected or not. Our numerical calculations show that the time width and the delay time of the π pulse are two critical… CONTINUE READING