Purification Strategy Optimization for Entanglement Routing in Quantum Networks
For quantum network designers, this work provides a method to optimize entanglement routing with purification, addressing a key bottleneck in practical quantum communication.
This work tackles the challenge of maintaining high-quality entanglement in quantum networks by optimizing purification strategies for routing. Using dynamic programming, the authors identify strategies that optimally balance resource consumption and end-to-end fidelity, demonstrating effectiveness across various scenarios.
Quantum networks rely on the efficient distribution of entanglement to enable long-distance quantum communication and information processing. A key challenge in these networks is the design of routing protocols capable of maintaining high quality entanglement in the presence of noise, decoherence, and imperfect operations, which progressively degrade the fidelity of entangled states through entanglement swapping. Entanglement purification provides an effective mechanism to mitigate this degradation at the cost of additional resources. In this work, we study purification-aware quantum routing and formulate the problem of selecting optimal purification strategies as an optimization task. By employing dynamic programming techniques, we identify strategies that optimally balance resource consumption and end-to-end fidelity, demonstrating the effectiveness of our approach across different scenarios.