Adiabatic fidelity for atom-dimer conversion system in stimulated Raman adiabatic passage

作者：Meng Shao Ying^*; Wu Wei

来源：Acta Physica Sinica, 2009, 58(8): 5311-5317.

• atom-dimer conversion system
• dark state
• stimulated Raman adiabatic passage
• adiabatic fidelity

From the non-U (1) invariance of the atom-dimer conversion system, we generalized the definition of fidelity to this nonlinear system. By making use of the adiabatic fidelity, we investigated the dynamics and adiabaticity of the atom-dimer conversion system in a stimulated Raman adiabatic passage (STIRAP). We found that the adiabatic fidelity for the coherent population trapping state or dark state, as the function of the adiabatic parameter, approaches to unity following a power law. The power exponent, however, is much smaller than that predicted by the linear adiabatic theorem. We further discuss how to achieve higher adiabatic fidelity for the dark state through optimizing the external parameters of STIRAP and hence to optimize the adiabaticity of the system and obtain high conversion efficiency.

• 出版日期2009-8
• 单位中国工程物理研究院