A high bandwidth quantum repeater

TL;DR

This paper proposes a versatile quantum repeater design that dynamically balances fidelity and success probability, optimizing long-distance entanglement generation using homogeneous physical resources.

Contribution

It introduces a novel physical and link-level design allowing dynamic control of noise levels and fidelity, enhancing quantum repeater efficiency.

Findings

High fidelity pairs (F=0.98+) achievable with optimized noise control

Dynamic fidelity-success trade-off improves long-distance entanglement rate

Homogeneous architecture simplifies implementation and resource management

Abstract

We present a physical- and link-level design for the creation of entangled pairs to be used in quantum repeater applications where one can control the noise level of the initially distributed pairs. The system can tune dynamically, trading initial fidelity for success probability, from high fidelity pairs (F=0.98 or above) to moderate fidelity pairs. The same physical resources that create the long-distance entanglement are used to implement the local gates required for entanglement purification and swapping, creating a homogeneous repeater architecture. Optimizing the noise properties of the initially distributed pairs significantly improves the rate of generating long-distance Bell pairs. Finally, we discuss the performance trade-off between spatial and temporal resources.