Improving the stimulated Raman adiabatic passage via dissipative quantum dynamics

Area of Science:

• Quantum Physics
• Quantum Dynamics
• Atomic Physics

Background:

• Stimulated Raman adiabatic passage (STIRAP) is a key technique for quantum state manipulation.
• Standard STIRAP and shortcut schemes face limitations in highly dissipative environments.
• Dephasing effects and imperfect initial states are typically detrimental to population transfer fidelity.

Purpose of the Study:

• To develop an improved STIRAP method utilizing dissipative quantum dynamics.
• To investigate the role of dephasing effects in enhancing population transfer robustness.
• To demonstrate the scheme's effectiveness in strong dissipative fields.

Main Methods:

• A novel STIRAP approach incorporating dissipative quantum dynamics is proposed.
• Designed laser pulses and controlled detuning are employed for population transfer.
• Numerical simulations are performed on a three-level system to analyze system dynamics.

Main Results:

• The proposed scheme achieves fast and robust population transfer, even with imperfect initial states.
• The method exhibits insensitivity to moderate fluctuations in experimental parameters.
• Dephasing effects of ground states and imperfect initial states are repurposed as beneficial resources.

Conclusions:

• The new STIRAP method effectively utilizes dissipative quantum dynamics, including dephasing, for enhanced population transfer.
• This approach offers a viable alternative for complete population transfer in strong dissipative regimes where conventional methods fail.
• The findings provide new strategies for quantum control in realistic, noisy quantum systems.