Uniting Quantum Processing Nodes of Cavity-Coupled Ions with Rare-Earth Quantum Repeaters Using Single-Photon Pulse...

Area of Science:

• Quantum Information Science
• Quantum Communication
• Solid-State Quantum Systems

Background:

• Hybrid quantum systems integrate diverse quantum components for enhanced functionality.
• Connecting disparate quantum platforms like trapped ions and rare-earth-doped crystals is challenging due to photon temporal mismatches.

Purpose of the Study:

• To propose a protocol for interfacing cavity-coupled trapped ions with rare-earth-doped crystal quantum repeaters.
• To enable remote quantum communication by overcoming temporal mismatches in photon generation.

Main Methods:

• Modification of the atomic frequency comb (AFC) quantum memory protocol.
• Application of the modified AFC protocol to rare-earth-doped crystals with inhomogeneous broadening.
• Development of a protocol for temporal reshaping of single-photon pulses.

Main Results:

• Demonstration of an efficient protocol for custom temporal reshaping of single photons.
• Preservation of photon purity during the temporal reshaping process.
• Successful interfacing protocol for hybrid quantum systems.

Conclusions:

• The proposed protocol offers a viable solution for connecting quantum processing nodes with quantum repeater backbones.
• This work facilitates the development of large-scale, hybrid quantum networks.
• Advances in quantum repeater technology are crucial for future quantum communication infrastructure.