Improving the stimulated Raman adiabatic passage via dissipative quantum dynamics

摘要

We propose a method to improve the stimulated Raman adiabatic passage(STIRAP) via dissipative quantum dynamics, taking into account the dephasingeffects. Fast and robust population transfer can be obtained with the scheme bythe designed pulses and detuning, even though the initial state of the systemis imperfect. With a concrete three-level system as an example, the influencesof the imperfect initial state, variations in the control parameters, andvarious dissipation effects are discussed in detail. The numerical simulationshows that the scheme is insensitive to moderate fluctuations of experimentalparameters and the relatively large dissipation effects of the excited state.Furthermore, the dominant dissipative factors, namely, the dephasing effects ofthe ground states and the imperfect initial state are no longer undesirable, infact, they are the important resources to the scheme. Therefore, the schemecould provide more choices for the realization of the complete populationtransfer in the strong dissipative fields