Publications | QIC Laboratory

Efficient Simulation of Hybrid Continuous- and Discrete-Variable Quantum Circuits via Gaussian Decompositions

2026

arXiv(プレプリント・未査読)

Kazufumi Tanji, Dot Belin Pio, Shohei Kiryu, Ulrik Lund Andersen, Masahiro Takeoka

https://arxiv.org/abs/2609.34793

ガウス関数の線形結合を用いて連続変数・離散変数が混在する量子回路をシミュレーションする枠組みを提案しています。

Improving the Loss Tolerance of Heralded Photonic GHZ States for Long-Distance Device-Independent Conference Key Agreement

2026

arXiv(プレプリント・未査読)

Yazeed K. Alwehaibi, Makoto Ishihara, Shakib Daryanoosh, Ewan Mer, Shang Yu, Wojciech Roga, Ian A. Walmsley, Masahiro Takeoka, Raj B. Patel

https://arxiv.org/abs/2609.24941v2

光子数符号化・光源構成・測定の割り当てを検討し長距離デバイス非依存会議鍵共有に向けた光GHZ状態の損失耐性を改善する手法を提案しています。

Improving the rate-loss scaling in polarization entanglement distribution using single-click entanglement swapping

2026

Optica

Hikaru Shimizu, Joe Yoshimoto, Daiki Ichii, Junko Ishi-Hayase, Rikizo Ikuta, Masahiro Takeoka

https://arxiv.org/abs/2507.14836

単一クリックのエンタングルメントスワッピングを用い偏光もつれ配信の損失に対する生成率のスケーリング改善を実験で示しました。

Symmetry-resolved tree tensor network analysis of Bell-state discrimination with ancilla-assisted passive linear optics

2026

arXiv:2609.07319

A. Kumar, W. Roga, D. K. Mishra, M. Takeoka

https://arxiv.org/abs/2609.07319

Enhancing noise robustness in device-independent conference key agreement with asymmetric parity-CHSH inequalities

2026

arXiv:2609.03551

M. Ishihara, W. Roga, J. B. Brask, M. Takeoka

https://arxiv.org/abs/2609.03551

Fundamental limits of parameter estimation with heralded optical non-Gaussian states generated from Gaussian resources

2026

arXiv:2608.06239

S. Kiryu, K. Tanji, Y. Ueda, K. Fukui, M. Takeoka

https://arxiv.org/abs/2608.06239

Information geometric quantification of effective privacy in quantum metrology

2026

arXiv:2607.11302

L. Bianchi, S. Yamaguchi, W. Roga, D. Bacco, M. Takeoka

https://arxiv.org/abs/2607.11302

Multipartite device-independent quantum key distribution using W states

2026

arXiv:2603.00937

M. Ishihara, W. Roga, M. Takeoka

https://arxiv.org/abs/2603.00937

Privacy in Continuous-Variable Distributed Quantum Sensing

2026

PRX Quantum

A. de Oliveira Junior, A. L. Andersen, B. L. Larsen, S. W. Moore, D. Markham, M. Takeoka, J. B. Brask, U. L. Andersen

Fault-tolerant modular quantum computing with surface codes using single-shot emission-based hardware

2026

Phys. Rev. Applied

S. Singh, R. Kashiwagi, K. Tanji, W. Roga, D. Bhatti, M. Takeoka, D. Elkouss

High-rate qutrit entanglement swapping with photon-number-basis

2026

Phys. Rev. Research

K. Tanji, H. Shimizu, M. Takeoka

Demonstration of sequential processors with quantum advantage and analysis of classical performance limit

2026

Phys. Rev. Research

S. Tateishi, W. Wang, B. Chevalier, T. Ono, M. Takeoka, W. Roga

量子ネットワーク技術の研究動向

2026

2026年電子情報通信学会ソサイエティ大会「量子通信・ネットワークにおける国内研究の最前線」、北海道大学、札幌、2026年9月25日(招待講演)

武岡 正裕

基底状態冷却が不要な連続量量子誤り訂正符号

2026

日本物理学会第81回年次大会,東京大学駒場キャンパス,2026年9月14日-17日

青木陽, 桐生翔平, 丹治和史, 武岡 正裕, 早瀬 潤子

線形光学を用いた三成分猫状態の生成とベル測定

2026

第87回応用物理学会秋季学術講演会,北海道大学札幌キャンパス,2026年9月8日-11日

桐生翔平, 青木陽, 丹治和史, 武岡正裕

Private quantum network sensing via loss-tolerant GHZ state distribution

2026

QCrypt 2026, The University of Ottawa, Canada, August 24-28, 2026.

Y. Ueda, M. Ishihara, W.Roga, M. Takeoka

Relaxing required detection efficiency of the Holz-inequality-based device-independent conference key agreement via noisy preprocessing

2026

QCrypt 2026, The University of Ottawa, Canada, August 24-28, 2026.

N. Koyama, M. Ishihara, M. Takeoka

Enhancing noise robustness in device-independent conference key agreement using the asymmetric parity-CHSH inequality

2026

Conference on Quantum Information (CQI) 2026, JW Marriott Dongdaemun Square Seoul, Seoul, Republic of Korea, July 1-3, 2026.

M. Ishihara, W. Roga, M. Takeoka

The metrological cost of heralded non-Gaussian optical states

2026

Conference on Quantum Information (CQI) 2026, JW Marriott Dongdaemun Square Seoul, Seoul, Republic of Korea, July 1-3, 2026.

S. Kiryu, K. Tanji, Y. Ueda, M. Takeoka

Quantum Error Correction Code for Thermal Bosonic States

2026

Conference on Quantum Information (CQI) 2026, JW Marriott Dongdaemun Square Seoul, Seoul, Republic of Korea, July 1-3, 2026.

H. Aoki, S. Kiryu, K. Tanji, M. Takeoka, J. Ishi-Hayase