Photon storage and routing in quantum dots with spin-orbit coupling.

Area of Science:

• Quantum physics
• Solid-state physics
• Quantum information science

Background:

• Efficient quantum memory is crucial for quantum information processing and communication.
• Solid-state platforms offer potential for practical quantum memory but face challenges.

Purpose of the Study:

• To propose a scheme for highly efficient and controllable storage and routing of single photons.
• To utilize quantum dots (QDs) with Rashba spin-orbit coupling (SOC) for this purpose.

Main Methods:

• Employing Rashba spin-orbit coupling in QDs to create electromagnetically induced transparency (EIT).
• Implementing single-photon propagation, storage, retrieval, and routing via EIT.
• Utilizing a weak microwave field to suppress propagation loss.

Main Results:

• Demonstrated flexible EIT for single-photon propagation and manipulation in QDs.
• Achieved high efficiency and fidelity in single-photon storage and routing.
• Showed significant suppression of propagation loss using a weak microwave field.

Conclusions:

• The proposed scheme enables efficient and controllable single-photon storage and routing.
• Rashba SOC in QDs provides a pathway for advanced solid-state quantum devices.
• This research advances photonic quantum information processing and transmission.