原子-分子转换效率和绝热保真度
Atom-to-molecule conversion efficiency and adiabatic fidelity
摘要：
利用平均场拉格朗日密度研究了两种费米子原子到玻色分子的转换效率。我们发现Feshbach共振辅助的STIRAP技术对$^6$ Li原子比对$^{40}$ K原子更有效。我们还对CPT态的对称性及其相关的守恒定律作了一般性的考虑，从而使我们能够给出CPT态绝热保真度的自然定义。然后，保真度的计算值提供了关于$^{40}$ K和$^6$ Li的转换效率为何明显不同的解释。
英文摘要：
The efficiency of converting two-species fermionic atoms into bosonic molecules is investigated in terms of mean-field Lagrangian density. We find that the STIRAP technique aided by Feshbach resonance is more effective than the bare Fechbach resonance for $^6$Li atoms rather than $^{40}$K atoms. We also make general consideration on the symmetry and its relevant conservation law, which enable us to introduce a natural definition of adiabatic fidelity for CPT state. The calculated values of the fidelity then provide an interpretation on why the conversion efficiencies for $^{40}$K and $^6$Li are distinctly different.
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