Repeater-Based Quantum Communication Protocol: Maximizing Teleportation Fidelity with Minimal Entanglement

Area of Science:

• Quantum Information Science
• Quantum Communication

Background:

• Quantum teleportation is vital for distributed quantum information processing.
• Noisy entangled states and long-range communication pose significant challenges to fidelity.
• Existing repeater-based protocols often rely on entanglement swapping with maximally entangled states.

Purpose of the Study:

• To propose a more efficient quantum teleportation protocol for specific noisy states.
• To achieve optimal teleportation fidelity with reduced entanglement consumption.
• To enhance the utility of quantum resources in repeater-based quantum networks.

Main Methods:

• Development of a novel protocol for quantum state transmission.
• Analysis of teleportation fidelity for noisy entangled states.
• Comparison with standard entanglement swapping protocols.

Main Results:

• The proposed protocol achieves the same optimal fidelity as standard methods for certain noisy states.
• The new protocol consumes less entanglement than conventional approaches.
• Enhanced fidelity is maintained even with increased end-to-end noise.

Conclusions:

• The developed protocol offers a more resource-efficient method for quantum state transmission.
• This advancement is particularly beneficial for noisy, long-range quantum communication.
• The findings promise improved practical applications of distributed quantum information protocols.