On the Analysis of Quantum Repeater Chains with Sequential Swaps

• URL: http://arxiv.org/abs/2405.18252v1
• Date: Tue, 28 May 2024 15:03:09 GMT
• Title: On the Analysis of Quantum Repeater Chains with Sequential Swaps
• Authors: Matheus Guedes de Andrade, Emily A. Van Milligen, Leonardo Bacciottini, Aparimit Chandra, Shahrooz Pouryousef, Nitish K. Panigrahy, Gayane Vardoyan, Don Towsley,
• Abstract summary: We evaluate the performance of two-way quantum repeater chains with sequential entanglement swapping. We consider memory decoherence, gate imperfections, and imperfect link-level entanglement generation.
• Score: 7.885533851646292
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We evaluate the performance of two-way quantum repeater chains with sequential entanglement swapping. Within the analysis we consider memory decoherence, gate imperfections, and imperfect link-level entanglement generation. Our main results include closed-form expressions for the average entanglement fidelity of the generated end-to-end entangled states. We generalize previous findings for the one-shot fidelity analysis and study the case where repeater chains serve end-to-end requests continuously. We provide solutions to the continuous request scenario by combining results from quantum information theory and queuing theory. Finally, we apply the formulas obtained to analyze the impacts of hardware parameters, i.e., coherence times and gate fidelity, and distance on the entanglement fidelity and secret key rate of homogeneous quantum repeater chains.

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