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Paper Abstract and Keywords
Presentation 2025-03-06 11:10
Multi-Armed Bandit Based Routing Method for Quantum Networks
Kim Minkyu, Kamiyama Noriaki (Ritsumeikan Univ.) NS2024-211
Abstract (in Japanese) (See Japanese page) 
(in English) Recent years have seen distributed quantum computing become essential for implementing complex calculations and large-scale tasks, as quantum computer performance heavily depends on the number of available qubits. However, fidelity, which indicates the quality of quantum states, degrades with communication distance and poses a serious challenge, especially in long-distance communications. Existing quantum networks use fixed routes without considering dynamic changes in fidelity during route selection, leading to issues with guaranteeing end-to-end fidelity. Additionally, quantum states are vulnerable to environmental noise causing fidelity degradation, which necessitates the use of distillation techniques, a form of purification, to maintain fidelity levels.
In this paper, we propose a dynamic route selection method that utilizes both fidelity-based path exploration and the Multi-Armed Bandit (MAB) algorithm to address these challenges. Specifically, we compare three approaches - ε-greedy MAB, Thompson Sampling, and Round Robin - and present an optimal route selection method that considers both fidelity and delay time for each path. In evaluation experiments using a Waxman random topology consisting of 50 nodes, Thompson Sampling achieves higher fidelity and lower delay times compared to other methods, demonstrating stable performance even in dynamic environments with changing arrival rates. These results indicate that our proposed method contributes to more efficient dynamic route selection in quantum networks.
Keyword (in Japanese) (See Japanese page) 
(in English) Quantum networks / Fidelity / Quantum distillation / Multi-armed bandit / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 419, NS2024-211, pp. 95-100, March 2025.
Paper # NS2024-211 
Date of Issue 2025-02-27 (NS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF NS2024-211

Conference Information
Committee IN NS  
Conference Date 2025-03-06 - 2025-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Industry Support Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NS 
Conference Code 2025-03-IN-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Multi-Armed Bandit Based Routing Method for Quantum Networks 
Sub Title (in English)  
Keyword(1) Quantum networks  
Keyword(2) Fidelity  
Keyword(3) Quantum distillation  
Keyword(4) Multi-armed bandit  
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1st Author's Name Kim Minkyu  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Kamiyama Noriaki  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Speaker Author-1 
Date Time 2025-03-06 11:10:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2024-211 
Volume (vol) vol.124 
Number (no) no.419 
Page pp.95-100 
#Pages 6 
Date of Issue 2025-02-27 (NS) 

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