Shunsuke Ota | Assistant Professor

Profile

Shunsuke Ota

Assistant Professor, Kodera Lab, Institute of Science Tokyo

I conduct research on fundamental technologies for quantum computers and qubits utilizing semiconductor quantum dots. I advance my research by incorporating a diverse range of techniques and methodologies, including precision measurement and control at cryogenic temperatures, and the automation of control leveraging machine learning such as Large Language Models (LLMs). Additionally, I am engaged in research on surface acoustic wave (SAW) devices.

Links & Contact

News

2026/09/08–10 Attended and presented research at the JSAP Autumn Meeting 2026.

Attended and presented research at the JSAP Autumn Meeting held at Hokkaido University. Also joined the banquets of both JSAP and the Quantum Information Engineering group to actively exchange ideas and network. On the way, I had the opportunity to view the Rapidus facility under construction in Chitose.
2026/04/01 Appointed as Assistant Professor, Department of Electrical and Electronic Engineering, School of Engineering, Institute of Science Tokyo.
2026/03/18 Received the 47th JSAP Outstanding Paper Award and delivered a commemorative presentation at the JSAP Spring Meeting @Tokyo.
2026/03/06 Gave an invited talk at the Leti Science Seminar @CEA-Leti (Grenoble, France).
2026/02 Two co-authored papers were published in the Japanese Journal of Applied Physics.
2025/12 Attended and presented research at the 1st International Workshop on Industrial-grade Ge Quantum Technology @Osaka.
2025/07 Attended and presented research at The International Symposium on Quantum Science, Technology and Innovation 2025 @Osaka.
2025/03 Received the FY2024 Seiichi Tejima Research Award (Doctoral Dissertation Award).
2025/01 Appointed as Specially Appointed Assistant Professor at the Institute of Science Tokyo.
2025 A co-authored paper was published in Appl. Phys. Lett.
2024/09 Received the 56th JSAP Young Scientist Presentation Award and delivered a commemorative presentation at the JSAP Autumn Meeting @Niigata.
2024/04 Appointed as a Researcher at Tokyo Institute of Technology.
2024/03 Received a Ph.D. in Engineering.
2024/02 First-authored papers were published in Phys. Rev. Applied and Appl. Phys. Express.

Career

04/2026 – Present Institute of Science Tokyo, Assistant Professor
01/2025 – 03/2026 Institute of Science Tokyo, Specially Appointed Assistant Professor
04/2024 – 12/2024 Institute of Science Tokyo (formerly Tokyo Institute of Technology), Researcher
03/2024 Tokyo Institute of Technology, Ph.D. in Engineering
09/2022 – 12/2022 University of Twente, EEMCS, NanoElectronics Group, Guest researcher
01/2022 – 02/2022 Institute Néel QuantECA, CNRS, France, Visiting scientist
03/2021 Tokyo Institute of Technology, M.Eng.
04/2019 – 03/2024 National Institute of Advanced Industrial Science and Technology (AIST), Research Assistant
03/2019 Tokyo Institute of Technology, B.Eng.

Publications

Journal articles

R. Mizokuchi, R. Wada, R. Matsuoka, S. Ota, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, T. Kodera. Improved readout accuracy of a silicon spin qubit via log-likelihood ratio, Japanese Journal of Applied Physics, 65, 02SP03 (2026).
D. Zhang†, N. Negami†, R. Mizokuchi†, S. Ota, R. Wada, T. Kodera. Multi-bit state discrimination using machine learning for IQ-encoded spin-qubit readout, Japanese Journal of Applied Physics, 65, 05SP22 (2026). (†: contributed equally to this work)
K. Fujiwara, S. Ota, T. Kodera, Y. Okazaki, N.-H. Kaneko, N. Jiang, Y. Niimi, S. Takada. Generation of a single-cycle surface acoustic wave pulse on LiNbO3 for application to thin-film materials, Appl. Phys. Lett. 127, 022406 (2025) [arXiv: 2507.02417].
S. Ota, Y. Okazaki, S. Nakamura, T. Oe, H. Sellier, C. Bäuerle, N.-H. Kaneko, T. Kodera, S. Takada. Suppression of electromagnetic crosstalk by differential excitation for SAW generation, Appl. Phys. Express 17, 022002 (2024) [arXiv: 2312.15413].
S. Ota, J. Wang, H. Edlbauer, Y. Okazaki, S. Nakamura, T. Oe, A. Ludwig, A. D. Wieck, H. Sellier, C. Bäuerle, N.-H. Kaneko, T. Kodera, S. Takada. On-demand single-electron source via single-cycle acoustic pulses, Phys. Rev. Applied 21, 024034 (2024) [arXiv: 2312.00274].
J. Wang, H. Edlbauer, A. Richard, S. Ota, W. Park, J. Shim, A. Ludwig, A. D. Wieck, H.-S. Sim, M. Urdampilleta, T. Meunier, T. Kodera, N.-H. Kaneko, H. Sellier, X. Waintal, S. Takada & C. Bäuerle. Coulomb-mediated antibunching of an electron pair surfing on sound, Nature Nanotechnology 18, 721 (2023) [arXiv: 2210.03452].
J. Wang*, S. Ota*, H. Edlbauer*, B. Jadot, P.-A. Mortemousque, A. Richard, Y. Okazaki, S. Nakamura, A. Ludwig, A. D. Wieck, M. Urdampilleta, T. Meunier, T. Kodera, N.-H. Kaneko, S. Takada, C. Bäuerle. Generation of a Single-Cycle Acoustic Pulse: A Scalable Solution for Transport in Single-Electron Circuits, Phys. Rev. X 12, 031035 (2022) [arXiv: 2208.00489]. (*: contributed equally to this work)
H. Edlbauer*, J. Wang*, S. Ota*, A. Richard, B. Jadot, P.-A. Mortemousque, Y. Okazaki, S. Nakamura, T. Kodera, N.-H. Kaneko, A. Ludwig, A. D. Wieck, M. Urdampilleta, T. Meunier, C. Bäuerle, S. Takada. In-flight distribution of an electron within a surface acoustic wave, Appl. Phys. Lett. 119, 114004 (2021) [arXiv: 2107.09823]. (*: contributed equally to this work)

International Conferences

First Author

S. Ota, T. Fukuda, T. Toshimitsu, R. Mizokuchi, T. Kodera. Cryogenic Characterization of Commercial Heterojunction Bipolar Transistors as Current Amplifiers Toward Semiconductor Spin Qubit Readout, 1st International Workshop on Industrial-grade Ge Quantum Technology, Dec. 2025.
S. Ota, S. I. Ibad, C. Kondo, R. Mizokuchi, R. Wada, R. Matsuoka, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, T. Kodera. Comparative evaluation of electron- and hole-properties in silicon quantum dots, The International Symposium on Quantum Science, Technology and Innovation 2025, July 2025. Peer-reviewed
S. Ota, J. Wang, H. Edlbauer, Y. Okazaki, S. Nakamura, T. Oe, A. Ludwig, A. D. Wieck, T. Kodera, C. Bäuerle, N.-H. Kaneko, S. Takada. On-demand Generation of Single Electrons with Acousto-Electric Pulses, The 12th Workshop on Semiconductor/Superconductor Quantum Coherence Effect and Quantum Information, Sept. 2023.
S. Ota, J. Wang, H. Edlbauer, Y. Okazaki, S. Nakamura, T. Oe, A. Ludwig, A.D. Wieck, T. Kodera, C. Bäuerle, S. Takada, N.-H. Kaneko. Crosstalk Effect for Acousto-Electric Quantized Current, 2023 International Conference on Solid State Devices and Materials (SSDM2023), B-2-04, Nagoya, Japan, September 6 (2023). Peer-reviewed
S. Ota, J. Wang, H. Edlbauer, Y. Okazaki, S. Nakamura, A. Ludwig, A.D. Wieck, T. Kodera, C. Bäuerle, S. Takada, N.-H. Kaneko. On-demand Single-Electron Source with Acousto-Electric Pulses, 25th International Conference on Electronic Properties of Two-Dimensional Systems/21th International Conference on Modulated Semiconductor Structures (EP2DS-25/MSS-21 Joint Conference), 10A-2, Grenoble, France, July 13 (2023). Peer-reviewed
S. Ota, J. Wang, H. Edlbauer, A. Richard, B. Jadot, P.-A. Mortemousque, Y. Okazaki, S. Nakamura, T. Kodera, N.-H. Kaneko, A. Ludwig, A. D. Wieck, M. Urdampilleta, T. Meunier, S. Takada, C. Bäuerle. Single Electron Transport with Chirp Surface Acoustic Wave, The 11th Workshop on Semiconductor/Superconductor Quantum Coherence Effect and Quantum Information, Feb. 2022.
S. Ota, J. Wang, H. Edlbauer, A. Richard, B. Jadot, P.-A. Mortemousque, Y. Okazaki, S. Nakamura, T. Kodera, N.-H. Kaneko, A. Ludwig, A.D. Wieck, M. Urdampilleta, T. Meunier, S. Takada, C. Bäuerle. Single-Electron Transport with Acousto-Electric Chirp Pulses, 24th International Conference on Electronic Properties of Two-Dimensional Systems/20th International Conference on Modulated Semiconductor Structures (EP2DS-24/MSS-20 Joint Conference), M-4-02, ALL-VIRTUAL Conference, November 2 (2021). Peer-reviewed
S. Ota, S. Takada, Y. Okazaki, S. Nakamura, N.-H. Kaneko, T. Kodera. Investigation of interdigital transducer for high-fidelity single spin transport, The 10th Workshop on Semiconductor/Superconductor Quantum Coherence Effect and Quantum Information, Dec. 2020.
S. Ota, S. Hiraoka, R. Mizokuchi, T. Kodera. Observation of bipolar Pauli spin blockade and the few-electron regime in a silicon linearly triple quantum dot, Topical Conference on Quantum Computing 2019 (TCQC2019), Kyoto, Japan, December 17-18 (2019). Peer-reviewed
S. Ota, S. Hiraoka, R. Matsuoka, R. Mizokuchi, T. Kodera. Bipolar Pauli spin blockade in a silicon linearly coupled triple quantum dot, 2019 International Conference on Solid State Devices and Materials (SSDM2019), E-1-03, Nagoya, Japan, September 3 (2019). Peer-reviewed

Co-Author

R. Mizokuchi, R. Matsuoka, S. Ota, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, T. Kodera. Characterization of Energy Relaxation Time of a Silicon Qubit under Readout Conditions, 37th International Conference on the Physics of Semiconductors (ICPS2026), We-P-106, Tokyo, Japan, Aug. 19 (2026). Peer-reviewed
D. Zhang, R. Mizokuchi, S. Ota, R. Wada, T. Kodera. Model Based Auto-Tuning of Double Quantum Dots, 37th International Conference on the Physics of Semiconductors (ICPS2026), We-P-105, Tokyo, Japan, Aug. 19 (2026). Peer-reviewed
K. Ebisawa, Y. Sato, S. I. Ibad, R. Matsuoka, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, S. Ota, R. Mizokuchi, T. Kodera. Single-Shot Charge Detection via RF Reflectometry in a Planar p-Type Silicon Quantum Dot, 37th International Conference on the Physics of Semiconductors (ICPS2026), We-P-100, Tokyo, Japan, Aug. 19 (2026). Peer-reviewed
T. Fukuda, T. Toshimitsu, S. Ota, R. Mizokuchi, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, T. Kodera. Cryogenic Characterization of SiGe Heterojunction Bipolar Transistors and Application to Silicon Qubit Readout, 37th International Conference on the Physics of Semiconductors (ICPS2026), Tu-P-115, Tokyo, Japan, Aug. 18 (2026). Peer-reviewed
R. Kawasoko, T. Morita, S. Kobayashi, S. Ota, T. Kodera, T. Moriyama, S. Tarucha, S. Matsuo. Device Fabrication towards Surface Phonon Irradiation on Josephson Junctions, Compound Semiconductor Week 2026 (CSW2026), TuP3E-04, Kumamoto, Japan, May 26 (2026). Peer-reviewed
R. Mizokuchi, R. Wada, R. Matsuoka, S. Ota, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, T. Kodera. Log-likelihood ratio test for improving accuracy in silicon spin qubit readout, 1st International Workshop on Industrial-grade Ge Quantum Technology (InGeQT workshop 2025), Dec. 2025.
R. Mizokuchi, R. Wada, R. Matsuoka, S. Ota, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, T. Kodera. Log-Likelihood Ratio for Improving Accuracy in Silicon Spin Qubit Readout, 2nd International Workshop on Quantum Information Engineering (QIE2025), Oct. 2025. Peer-reviewed
N. Negami, R. Mizokuchi, S. Ota, R. Wada, Z. Duanlian, T. Kodera. Multi-Bit State Classification via Machine Learning in IQ-Encoded Spin Qubit Readout, 2025 International Conference on Solid Devices and Materials (SSDM2025), Sept. 2025. Peer-reviewed
R. Mizokuchi, R. Wada, R. Matsuoka, S. Ota, I. Yanagi, T. Mine, R. Tsuchiya, D. Hisamoto, H. Mizuno, T. Kodera. Improved readout accuracy of a silicon spin qubit via maximum likelihood estimation, 2025 International Conference on Solid Devices and Materials (SSDM2025), Sept. 2025. Peer-reviewed
T. Kodera, R. Mizokuchi, S. Ota, M. Tadokoro, Y. Yamaoka, S. Hiraoka, K. Yamada, K. Horibe, G. Yamahata, S. Oda. Physically-defined silicon quantum dots for spin-based qubits, 1st QuTech-TokyoTech Symposium, Sept. 2019. Peer-reviewed
T. Kodera, R. Mizokuchi, S. Ota, M. Tadokoro, Y. Yamaoka, S. Hiraoka, K. Yamada, K. Horibe, G. Yamahata, S. Oda. Physically-defined multiple silicon quantum dots toward integration of spin-based quantum bits, Japan-Netherlands Quantum Conference, Sept. 2019. Peer-reviewed

Invited Talks

S. Ota. Fundamental Technologies for Scalable Semiconductor Quantum Computing, Leti Science Seminar, CEA-Leti, Grenoble, France, March 6 (2026).

Thesis

Surface Acoustic Wave-Driven Single-Electron Transport for Quantum Information Processing（Tokyo Institute of Technology、2024）

Portfolio

Images and photos I designed or took.

Semiconductor chip conceptual diagram

Surface acoustic wave device conceptual diagram

Thái Văn Lung Quận 1

Marseille

Inokashira Park