Kagawa University - Ono Laboratory

Demonstration of sequential processors with quantum advantage and analysis of classical performance limits
Shota Tateishi, Wenhao Wang, Baptiste Chevalier, Takafumi Ono, Masahiro Takeoka, Wojciech Roga
Phys. Rev. Research 8, 013157 (2026)

Evaluating a Multi-Color Entangled-Photon Source for a Bosonic Silicon Quantum Circuit
Koki Nagamachi, Hiroki Yamashita, Mikio Fujiwara, Shigehito Miki, Hirotaka Terai, Takafumi Ono
Japanese Journal of Applied Physics 64 102004 (2025)

Experimental investigation of single qubit quantum classifier with small number of samples
Shunsuke Abe, Shota Tateishi, Roga Wojciech, Masahiro Takeoka, Takafumi Ono
arXiv:2507.04764 (2025)

Quantum Contextuality Requires Counterfactual Gain
Yuki Sagawa, Jonte R. Hance, Holger F. Hofmann, Takafumi Ono
Phys. Rev. A 113, 012221 (2026)

A Gigahertz configurable silicon photonic integrated circuit nonlinear interferometer
Jonathan Frazer, Takafumi Ono, Jonathan C F Matthews
Quantum Science and Technology 10(2) 025033 (2025)

Quantum interference of pulsed time-bin entanglement generated from silicon ring resonator
Takafumi Ono, Yoshiaki Tsujimoto, Kentaro Wakui and Mikio Fujiwara
Scientific Reports 14, 1051 (2024), Selected as one of the Top 100 of 2024

Sequential minimum optimization algorithm with small sample size estimators
Wojciech Roga, Takafumi Ono, Masahiro Takeoka
AVS Quantum Sci.5, 033801 (2023) Selected as a featured article

Controlling and measuring a superposition of position and momentum
Takafumi Ono, Nigam Samantarray, John G. Rarity
Phys. Rev. A 108, 012215(2023)
Article：New Scientist

Demonstration of a Bosonic Quantum Classifier with Data Reuploading
Takafumi Ono, Wojciech Roga, Kentaro Wakui, Mikio Fujiwara, Shigehito Miki, Hirotaka Terai, Masahiro Takeoka
Phys. Rev. Lett. 131, 013601(2023)
Press release

Spectrally resolved NOON state interference
Rui-Bo Jin, Ryosuke Shimizu, Takafumi Ono, Mikio Fujiwara, Guang-Wei Deng, Qiang Zhou, Masahide Sasaki, Masahiro Takeoka
arXiv:2104.01062(2021)

Evaluation of a Nonlinear Interferometer Implemented on a Silicon Chip
小野貴史, Gary F. Sinclair, Damien Bonneau, Mark G. Thompson, Jonathan C, F. Matthews, John G. Rarity
レーザー研究 48(9) 499 - 504 2020年9月

"Quantum Technology Series (3) – Quantum Photonics" (Research Introduction Article)
Yano E plus No.205 pp. 8-12, April 2025
Yano Research Institute Ltd.

Universal Quantum Classifier Using Silicon Photonic Integrated Circuits
Takafumi Ono, Wojciech Roga, Masahiro Takeoka
Photonics News, Vol. 9, No. 3, pp. 152-156, March 2024

Experimental Verification of a Universal Quantum Classifier Using Silicon Photonic Integrated Circuits
- Towards the Realization of Quantum Machine Learning with Silicon Photonics -
Tomoo Takahara (Editorial Committee), Takafumi Ono (Interview Cooperation)
IEICE Journal, Vol. 106, No. 12, December 2023

Practical Applications of Quantum Technology and Its Implementation in Research and Development
Takafumi Ono (Contributor, Chapter 11, Section 4: "Quantum Sensing Using Photons")
Technical Information Institute, January 2023

Quantum Sensing Handbook
Takafumi Ono (Contributor, Chapter 5, Section 3: "Theory of Quantum Entangled Photons for Sensing")
NTS Corporation, March 2021

Observation of nonlinear interference on a silicon photonic chip
Takafumi Ono, Gary F. Sinclair, Damien Bonneau, Mark G. Thompson, Jonathan C, F. Matthews, d John G. Rarity
Optics Letters 44(5) 1277 - 1280 (2019)

Estimating the Indistinguishability of Heralded Single Photons Using Second-Order Correlation
Imad I. Faruque, Gary F. Sinclair, Damien Bonneau, Takafumi Ono, Christine Silberhorn, Mark G. Thompson, John G. Rarity
Phys. Rev. Applied 12 054029 (2019)

Spin-Squeezed Light Sources and Their Measurement Applications
Takafumi Ono
Optics, Vol. 47, No. 2, February 2018

Optical implementation of spin squeezing
Takafumi Ono, Javier Sabines-Chesterking, Hugo Cable, Jeremy L. O'Brien, Jonathan C. F. Matthews
NEW JOURNAL OF PHYSICS 19 053005 (2017)

Implementation of a quantum controlled-SWAP gate with photonic circuits
Takafumi Ono, Ryo Okamoto, Masato Tanida, Holger F. Hofmann, Shigeki Takeuchi
SCIENTIFIC REPORTS 7 45353 (2017)

Consistent and Efficient Nonparametric Different-Feature Selection
Satoshi Hara, Takayuki Katsuki, Hiroki Yanagisawa, Takafumi Ono, Ryo Okamoto, Shigeki Takeuchi
In Proceedings of the 20th International Conference on Artificial Intelligence and Statistics (AISTATS'17), VOL 54 130 - 138 (2017)

Quantum-state anomaly detection for arbitrary errors using a machine-learning technique
Satoshi Hara, Takafumi Ono, Ryo Okamoto, Takashi Washio, Shigeki Takeuchi
PHYSICAL REVIEW A 94(4) 042341 (2016)

An Entanglement-Enhanced Microscope
Shigeki Takeuchi, Takafumi Ono, Ryo Okamoto
Applied Physics, Vol. 84, No. 8, p.740 (2015)

Entangled Photons are Used to Enhance the Sensitivity of Microscope
Takafumi Ono, Ryo Okamoto, Shigeki Takeuchi
2 Physics Photonics 6 (2014)

Anomaly detection in reconstructed quantum states using a machine-learning technique
Satoshi Hara, Takafumi Ono, Ryo Okamoto, Takashi Washio, Shigeki Takeuchi
PHYSICAL REVIEW A 89(2) (2014)

An entanglement-enhanced microscope
Takafumi Ono, Ryo Okamoto, Shigeki Takeuchi
Nature Communications 4(2426) (2013)

Effects of photon losses on phase estimation near the Heisenberg limit using coherent light and squeezed vacuum
Takafumi Ono, Holger F. Hofmann
PHYSICAL REVIEW A 81(3) 033819 (2010)

CONTROL OF MULTI-PHOTON COHERENCE USING THE MIXING RATIO OF DOWN-CONVERTED PHOTONS AND WEAK COHERENT LIGHT
Takafumi Ono, Holger F. Hofmann
PROCEEDINGS OF THE 9TH INTERNATIONAL SYMPOSIUM ON FOUNDATIONS OF QUANTUM MECHANICS IN THE LIGHT OF NEW TECHNOLOGY 286 - 289 (2009)

Effects of photon losses on the phase sensitivity of multi-photon states
Takafumi Ono, Holger F. Hofmann
2009 LASERS & ELECTRO-OPTICS & THE PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, VOLS 1 AND 2 340 - 341 (2009)

Quantum enhancement of N-photon phase sensitivity by interferometric addition of down-converted photon pairs to weak coherent light
Takafumi Ono, Holger F. Hofmann
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 41(9) (2008)

High-photon-number path entanglement in the interference of spontaneously down-converted photon pairs with coherent laser light
Holger F. Hofmann, Takafumi Ono
PHYSICAL REVIEW A 76(3) 031806 (2007)

Generation of N-photon phase squeezed states by interference of downconverted photon pairs with weak coherent light
Holger F. Hofmann, Takafumi Ono
2007 PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, VOLS 1-4 211 - 212 (2007)