Optimized three-level quantum transfers based on frequency-modulated optical excitations

Area of Science:

• Quantum Control
• Quantum Information Science
• Atomic, Molecular, and Optical Physics

Background:

• Quantum control faces challenges in balancing high fidelity, speed, and noise robustness.
• These challenges impede the development and realization of practical quantum devices.
• Efficient quantum state transfer is crucial for quantum computation and information processing.

Purpose of the Study:

• To propose a novel theoretical protocol for accelerated quantum state transfer.
• To enhance the widely used stimulated Raman adiabatic passage technique.
• To achieve high fidelity, fast operation times, and robustness against noise in quantum systems.

Main Methods:

• The protocol is based on stimulated Raman adiabatic passage.
• It employs additional control fields on optical excitations along frequency sidebands.
• Numerical simulations are used to demonstrate efficiency and robustness.

Main Results:

• The protocol achieves accelerated adiabatic following in generic three-level systems.
• It dynamically counteracts undesired transitions, improving fidelity.
• The method is efficient across a wide parameter range and robust to environmental disturbances.
• Timescales approach the quantum speed limit, enabling faster quantum operations.

Conclusions:

• The proposed protocol offers a practical solution to key quantum control challenges.
• It facilitates experimental implementation without requiring new resources.
• The technique is applicable to quantum gates and scalable to multi-level systems.