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Effectiveness of cardinality-return weighted maximum independent set approach for financial portfolio optimization
Keita Takahashi, Tetsuro Abe, Yasuhito Nakamura, Ryo Hidaka, Shuta Kikuchi, and Shu Tanaka
Journal of the Physical Society of Japan, 2026.
Peer-reviewed
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イジングマシンを用いた複合制約下のダンプトラック運搬計画最適化
池内一樹，菊池脩太，小川涼，天野和洋，今関修，田中宗
Peer-reviewed
doi: 10.82737/transinfj.2026JDP7004
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Parallelizable search-space decomposition for large-scale combinatorial optimization problems using quadratic unconstrained binary optimization
Eiji Kawase, Shuta Kikuchi, Hideaki Tamai, Shu Tanaka
Scientific Reports, 2026.
Peer-reviewed
doi: 10.1038/s41598-026-57443-z
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Factorization Machine with Quadratic-Optimization Annealing for RNA Inverse Folding and Evaluation of Binary-Integer Encoding and Nucleotide Assignment
Shuta Kikuchi, Shu Tanaka
Scientific Reports, 16, 20460, 2026.
Peer-reviewed
doi: 10.1038/s41598-026-50891-7
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Improving FMQA via Initial Training Data Design Considering Marginal Bit Coverage in One-Hot Encoding
Taiga Hayashi, Yuya Seki, Kotaro Terada, Yosuke Mukasa, Shuta Kikuchi, Shu Tanaka
arXiv, arXiv:2605.04825, 2026.
Under Review / Submitted
doi: 10.48550/arXiv.2605.04825
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Comparative evaluation of black-box optimization methods for RAN function placement problem
Shun Furusawa, Chihiro Dogo, Kazuhiro Saito, Yuya Seki, Shuta Kikuchi, and Shu Tanaka
IEICE Communications Express, 15(2), pp. 21-24, 2026.
Peer-reviewed
doi: 10.23919/comex.2025XBL0131
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SWIFT-FMQA: Enhancing Factorization Machine with Quadratic-Optimization Annealing via Sliding Window
Mayumi Nakano, Yuya Seki, Shuta Kikuchi, and Shu Tanaka
IEEE Access, 14, pp. 10977-10990, 2026.
Peer-reviewed
doi: 10.1109/ACCESS.2026.3655591
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Construction of SubQUBOs by K-means Clustering of QUBO Variables
Yuko Kamishima, Shuta Kikuchi, and Shu Tanaka
IEEE Access, 13, pp. 204807-204821, 2025.
Peer-reviewed
doi: 10.1109/ACCESS.2025.3638373
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TBA
Shuta Kikuchi, Taisei Mukai, Keisuke Nakajima, Yasuki Kato, Takeshi Takizawa, Junichi Sugiyama, Yasushi Kakizawa, and Setsuya Kurahashi
Under Review / Submitted
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Extending Sample Persistence Variable Reduction for Constrained Combinatorial Optimization Problems
Shunta Ide, Shuta Kikuchi, and Shu Tanaka
arXiv, arXiv:2509.19280, 2025.
Under Review / Submitted
doi: 10.48550/arXiv.2509.19280
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Effectiveness of Hybrid Optimization Method for Quantum Annealing Machines
Shuta Kikuchi, Nozomu Togawa, and Shu Tanaka
arXiv, arXiv:2507.15544, Jul 21, 2025.
Under Review / Submitted
doi: 10.48550/arXiv.2507.15544
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Quantification of droplet and contact transmission risks among elementary school students based on network analyses using video-recorded data
Shuta Kikuchi†, Keisuke Nakajima†, Yasuki Kato, Takeshi Takizawa, Junichi Sugiyama, Taisei Mukai, Yasushi Kakizawa, and Setsuya Kurahashi
PLOS ONE, 20(2), e0313364, 2025.
Peer-reviewed
doi: 10.1371/journal.pone.0313364
† These authors contributed equally to this work.
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Performance of Domain-Wall Encoding in a Digital Ising Machine
Shuta Kikuchi†, Kotaro Takahashi†, and Shu Tanaka
arXiv, arXiv:2410.11198, 2024.
Under Review / Submitted
doi: 10.48550/arXiv.2410.11198
† These authors contributed equally to this work.
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Hybrid Optimization Method Using Simulated-Annealing-Based Ising Machine and Quantum Annealer
Shuta Kikuchi, Nozomu Togawa, and Shu Tanaka
Journal of the Physical Society of Japan, 92(12), 124002, 2023.
Peer-reviewed
doi: 10.7566/JPSJ.92.124002
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Dynamical Process of a Bit-Width Reduced Ising Model With Simulated Annealing
Shuta Kikuchi, Nozomu Togawa, and Shu Tanaka
IEEE Access, 11, pp. 95493–95506, 2023.
Peer-reviewed
doi: 10.1109/ACCESS.2023.3310875
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Characterisation of bacteria representing a novel Nitrosomonas clade: Physiology, genomics and distribution of missing ammonia oxidizer
Shuta Kikuchi†, Hirotsugu Fujitani†, Kento Ishii, Rino Isshiki, Yuji Sekiguchi, and Satoshi Tsuneda
Environmental Microbiology Reports, 15(5), pp. 404–416, 2023.
Peer-reviewed
doi: 10.1111/1758-2229.13158
† These authors contributed equally to this work.
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Genomic and Physiological Characteristics of a Novel Nitrite-Oxidizing Nitrospira Strain Isolated From a Drinking Water Treatment Plant
Hirotsugu Fujitani, Kengo Momiuchi, Kento Ishii, Manami Nomachi, Shuta Kikuchi, Norisuke Ushiki, Yuji Sekiguchi, and Satoshi Tsuneda
Frontiers in Microbiology, 11, 545190, 2020.
Peer-reviewed
doi: 10.3389/fmicb.2020.545190