CV | FEBQI

Professional Experience

Apr. 2025 – present

RIKEN Hakubi Team Leader (primary)

RIKEN Pioneering Research Institute (PRI)
Apr. 2021 – present

RIKEN Hakubi Team Leader (concurrent)

RIKEN Center for Quantum Computing (RQC)
Sep. 2020 – Mar. 2025

RIKEN Hakubi Team Leader (primary)

RIKEN Cluster for Pioneering Research (CPR)
Sep. 2020 – Mar. 2021

RIKEN Hakubi Team Leader (concurrent)

RIKEN Center for Emergent Matter Science (CEMS)
Oct. 2017 – Mar. 2021

PRESTO Researcher (concurrent)

Japan Science and Technology Agency (JST)
Oct. 2016 – Aug. 2020

Postdoctoral Researcher (primary)

Okinawa Institute of Science and Technology Graduate University (OIST)

Education

Sep. 2011 – Sep. 2016

Ph.D.

Delft University of Technology, the Netherlands
Sep. 2009 – Sep. 2011

M.Sc. in Engineering

Keio University, Japan
Sep. 2007 – Sep. 2009

Engineering Degree

École Centrale Marseille, France
Apr. 2005 – Sep. 2009

B.Sc. in Applied Physics and Physico-Informatics

Keio University, Japan

Awards and Honors

2026
- Women Researcher Encouragement Award (D&I Award), The Japan Society of Applied Physics
2025
- Best Poster Award, LT30, Bilbao, Spain (A. Jennings, I. Grytsenko, Y. Tian, O. Rybalko, J. Wang, I. J. Barabash, and E. Kawakami)
2024
- Funai Academic Award
2022
- Best Poster Award, ULT 2022 (I. Grytsenko, A. Jennings, O. Rybalko, and E. Kawakami)
- Special Jury Prize, RIKEN Diversity Initiative Award 2022
2019
- Best Poster Award, QFS2019, Edmonton (E. Kawakami and D. Konstantinov)
2012
- JASSO Scholarship Loan Exemption for Outstanding Achievement
2011
- Nakajima Foundation International Exchange Scholarship
2010
- Fujiwara Scholarship, Graduate School of Science and Technology, Keio University
2008
- French Government Scholarship

External Research Funds — Principal Investigator

2025–2029
JST ASPIRE FOR RISING SCIENTISTS
- Realization of spin qubits using floating electrons on solid neon
- Total: 68,790,000 JPY
2026–2027
The Sumitomo Foundation, Grant for Basic Science Research
- Research on controlled deposition and characterization techniques of solid neon in cryogenic environments
- Total: 3,000,000 JPY
2025–2026
The Hattori Hokokai Foundation, Engineering Research Encouragement Grant
- Strong coupling between microwave photons and plasmons in a pure physical system
- Total: 1,000,000 JPY
2025–2026
Murata Science Foundation, Research Grant
- Demonstration of qubit readout technology using a tunnel diode oscillator
- Total: 4,720,000 JPY
2021–2027
JST FOREST
- Realization of qubits using electrons on the surface of helium
- Total: 50,000,000 JPY
2022–2025
Yazaki Memorial Foundation for Science and Technology, General Research Grant
- Development of cryogenic microwave generators for scaling up qubits
- Total: 2,000,000 JPY
2018–2021
JSPS KAKENHI, Early-Career Scientists
- Establishment of qubit-state readout technology using a tunnel diode
- Total: 3,640,000 JPY
2017–2020
JST PRESTO
- Towards the realization of a universal digital quantum computer using electrons on the surface of helium
- Total: 40,000,000 JPY

Committee and Advisory Activities

2021–present
- Member, MEXT Quantum Science and Technology Committee
2026–present
- Ad hoc reviewer for research proposals, French public research funding agency
2025–present
- Editor, Scientific Reports
2024–2025
- Deputy Chair, RIKEN Scientists' Assembly Steering Committee
2024–present
- Ad hoc reviewer for research proposals, U.S. Department of Energy (DOE)
2025
- Ad hoc reviewer for proposals, Austrian Science Fund (FWF)
- International Advisory Committee, ULT 2025
2021–2026
- International Advisory Committee, International Symposium on Quantum Fluids and Solids (QFS)
2024
- Organizer, Quantum Technologies with Floating Charged Particles Workshop

Teaching Experience

Apr. 2022–Dec. 2023
- Lecturer, Frontiers of Contemporary Science (Nara Women's University, Faculty of Science, part-time)
Apr.–Sep. 2019
- Lecturer, Medical English (University of the Ryukyus, School of Medicine, part-time)
Sep. 2013–Mar. 2014
- Teaching Assistant, Quantum Mechanics (Delft University of Technology, Applied Physics)
Sep. 2012–Mar. 2013
- Teaching Assistant, Statistical Physics (Delft University of Technology, Applied Physics)
2010
- Teaching Assistant, Condensed Matter Physics (Keio University, Faculty of Science and Technology)

Publications

Underline: FEBQI lab member | ^*: Corresponding author

2026

arXiv

A charge qubit on solid neon in a spin-qubit compatible circuit QED platform

Jun Wang^*, Yiran Tian, Ivan Grytsenko, Asher Jennings, Xianjing Zhou, Hirotaka Terai, Dafei Jin, and Erika Kawakami^*

arXiv:2605.31185 (2026).

arXiv Bib

@article{wang2026neonqubit,
  title = {A charge qubit on solid neon in a spin-qubit compatible circuit {QED} platform},
  author = {Wang, Jun and Tian, Yiran and Grytsenko, Ivan and Jennings, Asher and Zhou, Xianjing and Terai, Hirotaka and Jin, Dafei and Kawakami, Erika},
  journal = {arXiv},
  number = {arXiv:2605.31185},
  year = {2026},
}

arXiv

Strong Coupling Between RF Photons and Plasmons of Electrons on Liquid Helium

Asher Jennings^*, Ivan Grytsenko, Thomas Giovansili, Itay Josef Barabash, Oleksiy Rybalko, Yiran Tian, Jun Wang, Hiroki Ikegami, and Erika Kawakami^*

arXiv:2601.22552 (2026).

arXiv Bib

@article{jennings2025plasmon,
  title = {Strong Coupling Between RF Photons and Plasmons of Electrons on Liquid Helium},
  author = {Jennings, Asher and Grytsenko, Ivan and Giovansili, Thomas and Barabash, Itay Josef and Rybalko, Oleksiy and Tian, Yiran and Wang, Jun and Ikegami, Hiroki and Kawakami, Erika},
  journal = {arXiv},
  number = {arXiv:2601.22552},
  year = {2026},
}

PRAppl

Nb-Ti-N nanowire resonators and prospects for spin-photon coupling with electrons on solid neon

Yiran Tian, Ivan Grytsenko, Asher Jennings, Jun Wang, Hiroki Ikegami, Xianjing Zhou, Shuhei Tamate, Hirotaka Terai, Hiroki Kutsuma, Dafei Jin, Monica Benito, and Erika Kawakami^*

Phys. Rev. Applied 25, 024011 (2026).

DOI arXiv Bib Journal

@article{tian2025neon,
  title = {Nb-Ti-N nanowire resonators and prospects for spin-photon coupling with electrons on solid neon},
  author = {Tian, Yiran and Grytsenko, Ivan and Jennings, Asher and Wang, Jun and Ikegami, Hiroki and Zhou, Xianjing and Tamate, Shuhei and Terai, Hirotaka and Kutsuma, Hiroki and Jin, Dafei and Benito, Monica and Kawakami, Erika},
  journal = {Phys. Rev. Applied},
  volume = {25},
  pages = {024011},
  year = {2026},
  doi = {10.1103/jq9v-n4rn},
  overleaf = {https://www.overleaf.com/read/vhqcrdqczzjc#4a4b63},
  index = {2024 neon SC nanowire},
}

2025

PRL

Probing the Quantum Capacitance of Rydberg Transitions of Surface Electrons on Liquid Helium via Microwave Frequency Modulation

Asher Jennings^*, Ivan Grytsenko, Yiran Tian, Oleksiy Rybalko, Jun Wang, Itay Josef Barabash, and Erika Kawakami^*

Phys. Rev. Lett. 135, 087001 (2025).

Editors’ Suggestion

DOI arXiv Bib Journal

@article{jennings2025rydberg,
  title = {Probing the Quantum Capacitance of Rydberg Transitions of Surface Electrons on Liquid Helium via Microwave Frequency Modulation},
  author = {Jennings, Asher and Grytsenko, Ivan and Tian, Yiran and Rybalko, Oleksiy and Wang, Jun and Barabash, Itay Josef and Kawakami, Erika},
  journal = {Phys. Rev. Lett.},
  volume = {135},
  pages = {087001},
  year = {2025},
  doi = {10.1103/5y8p-qhb4},
  overleaf = {https://www.overleaf.com/read/wnybdtvxsxyk#ca9ad5},
  overleaf_suppl = {https://www.overleaf.com/read/vhmsmhdscrjm#87fba9},
  index = {2024 Rydberg FM},
  note = {Editors' Suggestion},
}

JLTP

Characterization of Tunnel Diode Oscillator for Qubit Readout Applications

Ivan Grytsenko, Sander van Haagen, Oleksiy Rybalko, Asher Jennings, Rajesh Mohan, Yiran Tian, and Erika Kawakami^*

J. Low Temp. Phys. 219, 282 (2025).

DOI arXiv Bib Journal

@article{grytsenko2024tdo,
  title = {Characterization of Tunnel Diode Oscillator for Qubit Readout Applications},
  author = {Grytsenko, Ivan and {van Haagen}, Sander and Rybalko, Oleksiy and Jennings, Asher and Mohan, Rajesh and Tian, Yiran and Kawakami, Erika},
  journal = {J. Low Temp. Phys.},
  volume = {219},
  pages = {282},
  year = {2025},
  doi = {10.1007/s10909-025-03293-4},
  overleaf = {https://www.overleaf.com/read/gwktzgxsvgbv#e3c703},
  index = {2025 JLTP TDO},
}

2024

APL

Quantum computing using floating electrons on cryogenic substrates: Potential and challenges

Asher Jennings^*, Xianjing Zhou, Ivan Grytsenko, and Erika Kawakami^*

Appl. Phys. Lett. 124, 120501 (2024).

DOI arXiv Bib Journal

@article{jennings2024perspectives,
  title = {Quantum computing using floating electrons on cryogenic substrates: Potential and challenges},
  author = {Jennings, Asher and Zhou, Xianjing and Grytsenko, Ivan and Kawakami, Erika},
  lab_members = {Zhou},
  journal = {Appl. Phys. Lett.},
  volume = {124},
  pages = {120501},
  year = {2024},
  doi = {10.1063/5.0179700},
  overleaf = {https://www.overleaf.com/read/knxxdvsvhvyt#29ec0d},
  index = {2024 APL Perspectives},
}

2023

PRAppl

Blueprint for quantum computing using electrons on helium

Erika Kawakami^*, Jiabao Chen, Monica Benito, and Denis Konstantinov

Phys. Rev. Applied 20, 054022 (2023).

DOI arXiv Bib Journal

@article{kawakami2023blueprint,
  title = {Blueprint for quantum computing using electrons on helium},
  author = {Kawakami, Erika and Chen, Jiabao and Benito, Monica and Konstantinov, Denis},
  journal = {Phys. Rev. Applied},
  volume = {20},
  pages = {054022},
  year = {2023},
  doi = {10.1103/PhysRevApplied.20.054022},
  overleaf = {https://www.overleaf.com/read/gbxxyfjxmrgq#de6658},
  index = {2023 PRApplied Blueprint},
}

2021

PRL

Relaxation of the Excited Rydberg States of Surface Electrons on Liquid Helium

Erika Kawakami^*, Asem Elarabi, and Denis Konstantinov

Phys. Rev. Lett. 126, 106802 (2021).

DOI Bib Journal

@article{kawakami2021rydberg,
  title = {Relaxation of the Excited Rydberg States of Surface Electrons on Liquid Helium},
  author = {Kawakami, Erika and Elarabi, Asem and Konstantinov, Denis},
  journal = {Phys. Rev. Lett.},
  volume = {126},
  pages = {106802},
  year = {2021},
  doi = {10.1103/PhysRevLett.126.106802},
}

JLTP

Cryogenic Amplification of Image-Charge Detection for Readout of Quantum States of Electrons on Liquid Helium

Asem Elarabi, Erika Kawakami, and Denis Konstantinov

J. Low Temp. Phys. 202, 456 (2021).

DOI Bib Journal

@article{elarabi2021cryogenic,
  title = {Cryogenic Amplification of Image-Charge Detection for Readout of Quantum States of Electrons on Liquid Helium},
  author = {Elarabi, Asem and Kawakami, Erika and Konstantinov, Denis},
  journal = {J. Low Temp. Phys.},
  volume = {202},
  pages = {456},
  year = {2021},
  doi = {10.1007/s10909-020-02526-2},
}

2019

PRL

Image-Charge Detection of the Rydberg States of Surface Electrons on Liquid Helium

Erika Kawakami^*, Asem Elarabi, and Denis Konstantinov

Phys. Rev. Lett. 123, 086801 (2019).

Editors’ Suggestion

DOI Bib Journal

@article{kawakami2019image,
  title = {Image-Charge Detection of the Rydberg States of Surface Electrons on Liquid Helium},
  author = {Kawakami, Erika and Elarabi, Asem and Konstantinov, Denis},
  journal = {Phys. Rev. Lett.},
  volume = {123},
  pages = {086801},
  year = {2019},
  doi = {10.1103/PhysRevLett.123.086801},
  note = {Editors' Suggestion},
}

PRAppl

Impact of Classical Control Electronics on Qubit Fidelity

Jeroen P. G. van Dijk, Erika Kawakami, Raymond N. Schouten, Menno Veldhorst, Lieven M. K. Vandersypen, Masoud Babaie, Edoardo Charbon, and Fabio Sebastiano

Phys. Rev. Applied 12, 044054 (2019).

DOI Bib Journal

@article{vandijk2019impact,
  title = {Impact of Classical Control Electronics on Qubit Fidelity},
  author = {{van Dijk}, Jeroen P. G. and Kawakami, Erika and Schouten, Raymond N. and Veldhorst, Menno and Vandersypen, Lieven M. K. and Babaie, Masoud and Charbon, Edoardo and Sebastiano, Fabio},
  journal = {Phys. Rev. Applied},
  volume = {12},
  pages = {044054},
  year = {2019},
  doi = {10.1103/PhysRevApplied.12.044054},
}

2018

Nature

A Programmable Two-Qubit Quantum Processor in Silicon

Thomas F. Watson, Stephen G. J. Philips, Erika Kawakami, Daniel R. Ward, Pasquale Scarlino, Menno Veldhorst, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, and Lieven M. K. Vandersypen

Nature 555, 633 (2018).

DOI Bib Journal

@article{watson2018two,
  title = {A Programmable Two-Qubit Quantum Processor in Silicon},
  author = {Watson, Thomas F. and Philips, Stephen G. J. and Kawakami, Erika and Ward, Daniel R. and Scarlino, Pasquale and Veldhorst, Menno and Savage, Donald E. and Lagally, Max G. and Friesen, Mark and Coppersmith, Susan N. and Eriksson, Mark A. and Vandersypen, Lieven M. K.},
  journal = {Nature},
  volume = {555},
  pages = {633},
  year = {2018},
  doi = {10.1038/nature25766},
}

npj QI

Valley Dependent Anisotropic Spin Splitting in Silicon Quantum Dots

Rifat Ferdous, Erika Kawakami, Pasquale Scarlino, Michał P. Nowak, Daniel R. Ward, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, Lieven M. K. Vandersypen, and Rajib Rahman

npj Quantum Inf. 4, 26 (2018).

DOI Bib Journal

@article{ferdous2018valley,
  title = {Valley Dependent Anisotropic Spin Splitting in Silicon Quantum Dots},
  author = {Ferdous, Rifat and Kawakami, Erika and Scarlino, Pasquale and Nowak, Michał P. and Ward, Daniel R. and Savage, Donald E. and Lagally, Max G. and Friesen, Mark and Coppersmith, Susan N. and Eriksson, Mark A. and Vandersypen, Lieven M. K. and Rahman, Rajib},
  journal = {npj Quantum Inf.},
  volume = {4},
  pages = {26},
  year = {2018},
  doi = {10.1038/s41534-018-0075-1},
}

2017

PRB

Dressed Photon-Orbital States in a Quantum Dot: Inter-Valley Spin Resonance

Pasquale Scarlino, Erika Kawakami, Thibaut Jullien, Daniel R. Ward, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, and Lieven M. K. Vandersypen

Phys. Rev. B 95, 165429 (2017).

DOI Bib Journal

@article{scarlino2017dressed,
  title = {Dressed Photon-Orbital States in a Quantum Dot: Inter-Valley Spin Resonance},
  author = {Scarlino, Pasquale and Kawakami, Erika and Jullien, Thibaut and Ward, Daniel R. and Savage, Donald E. and Lagally, Max G. and Friesen, Mark and Coppersmith, Susan N. and Eriksson, Mark A. and Vandersypen, Lieven M. K.},
  journal = {Phys. Rev. B},
  volume = {95},
  pages = {165429},
  year = {2017},
  doi = {10.1103/PhysRevB.95.165429},
}

2016

PNAS

Gate Fidelity and Coherence of an Electron Spin in a Si/SiGe Quantum Dot with Micromagnet

Erika Kawakami, Thibaut Jullien, Pasquale Scarlino, Daniel R. Ward, Donald E. Savage, Max G. Lagally, Viatcheslav Dobrovitski, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, and Lieven M. K. Vandersypen

Proc. Natl. Acad. Sci. 113, 11738 (2016).

DOI Bib Journal

@article{kawakami2016gate,
  title = {Gate Fidelity and Coherence of an Electron Spin in a Si/SiGe Quantum Dot with Micromagnet},
  author = {Kawakami, Erika and Jullien, Thibaut and Scarlino, Pasquale and Ward, Daniel R. and Savage, Donald E. and Lagally, Max G. and Dobrovitski, Viatcheslav and Friesen, Mark and Coppersmith, Susan N. and Eriksson, Mark A. and Vandersypen, Lieven M. K.},
  journal = {Proc. Natl. Acad. Sci.},
  volume = {113},
  number = {42},
  pages = {11738},
  year = {2016},
  doi = {10.1073/pnas.1603251113},
}

2015

PRL

Second harmonic coherent driving of a spin qubit in Si/SiGe single quantum dot

Pasquale Scarlino, Erika Kawakami, Daniel R. Ward, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, and Lieven M. K. Vandersypen

Phys. Rev. Lett. 115, 106802 (2015).

DOI Bib Journal

@article{scarlino2015second,
  title = {Second harmonic coherent driving of a spin qubit in Si/SiGe single quantum dot},
  author = {Scarlino, Pasquale and Kawakami, Erika and Ward, Daniel R. and Savage, Donald E. and Lagally, Max G. and Friesen, Mark and Coppersmith, Susan N. and Eriksson, Mark A. and Vandersypen, Lieven M. K.},
  journal = {Phys. Rev. Lett.},
  volume = {115},
  pages = {106802},
  year = {2015},
  doi = {10.1103/PhysRevLett.115.106802},
}

2014

Nat. Nano.

Electrical Control of a Long-Lived Spin Qubit in a Si/SiGe Quantum Dot

Erika Kawakami, Pasquale Scarlino, Daniel R. Ward, Floris R. Braakman, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, and Lieven M. K. Vandersypen

Nat. Nanotechnol. 9, 666 (2014).

DOI Bib Journal

@article{kawakami2014electrical,
  title = {Electrical Control of a Long-Lived Spin Qubit in a Si/SiGe Quantum Dot},
  author = {Kawakami, Erika and Scarlino, Pasquale and Ward, Daniel R. and Braakman, Floris R. and Savage, Donald E. and Lagally, Max G. and Friesen, Mark and Coppersmith, Susan N. and Eriksson, Mark A. and Vandersypen, Lieven M. K.},
  journal = {Nat. Nanotechnol.},
  volume = {9},
  pages = {666},
  year = {2014},
  doi = {10.1038/nnano.2014.153},
}

PRL

Spin-Relaxation Anisotropy in a GaAs Quantum Dot

Pasquale Scarlino, Erika Kawakami, Peter Stano, Mohammad Shafiei, Christian Reichl, Werner Wegscheider, and Lieven M. K. Vandersypen

Phys. Rev. Lett. 113, 256802 (2014).

Editors’ Suggestion

DOI Bib Journal

@article{scarlino2014spin,
  title = {Spin-Relaxation Anisotropy in a GaAs Quantum Dot},
  author = {Scarlino, Pasquale and Kawakami, Erika and Stano, Peter and Shafiei, Mohammad and Reichl, Christian and Wegscheider, Werner and Vandersypen, Lieven M. K.},
  journal = {Phys. Rev. Lett.},
  volume = {113},
  pages = {256802},
  year = {2014},
  doi = {10.1103/PhysRevLett.113.256802},
  note = {Editors' Suggestion},
}

2013

APL

Excitation of a Si/SiGe Quantum Dot Using an On-Chip Microwave Antenna

Erika Kawakami, Pasquale Scarlino, Lars R. Schreiber, Jonathan R. Prance, Donald E. Savage, Max G. Lagally, Mark A. Eriksson, and Lieven M. K. Vandersypen

Appl. Phys. Lett. 103, 132410 (2013).

DOI Bib Journal

@article{kawakami2013excitation,
  title = {Excitation of a Si/SiGe Quantum Dot Using an On-Chip Microwave Antenna},
  author = {Kawakami, Erika and Scarlino, Pasquale and Schreiber, Lars R. and Prance, Jonathan R. and Savage, Donald E. and Lagally, Max G. and Eriksson, Mark A. and Vandersypen, Lieven M. K.},
  journal = {Appl. Phys. Lett.},
  volume = {103},
  pages = {132410},
  year = {2013},
  doi = {10.1063/1.4821995},
}

2012

PRL

Coherent Storage of Photoexcited Triplet States Using ^29Si Nuclear Spins in Silicon

Waseem Akhtar, Vasileia Filidou, Takeharu Sekiguchi, Erika Kawakami, Tatsumasa Itahashi, Leonid Vlasenko, John J. L. Morton, and Kohei M. Itoh

Phys. Rev. Lett. 108, 097601 (2012).

DOI Bib Journal

@article{akhtar2012coherent,
  title = {Coherent Storage of Photoexcited Triplet States Using {$^{29}$}Si Nuclear Spins in Silicon},
  author = {Akhtar, Waseem and Filidou, Vasileia and Sekiguchi, Takeharu and Kawakami, Erika and Itahashi, Tatsumasa and Vlasenko, Leonid and Morton, John J. L. and Itoh, Kohei M.},
  journal = {Phys. Rev. Lett.},
  volume = {108},
  pages = {097601},
  year = {2012},
  doi = {10.1103/PhysRevLett.108.097601},
}

Professional Experience

RIKEN Hakubi Team Leader (primary)

RIKEN Hakubi Team Leader (concurrent)

RIKEN Hakubi Team Leader (primary)

RIKEN Hakubi Team Leader (concurrent)

PRESTO Researcher (concurrent)

Postdoctoral Researcher (primary)

Education

Ph.D.

M.Sc. in Engineering

Engineering Degree

B.Sc. in Applied Physics and Physico-Informatics

Awards and Honors

External Research Funds — Principal Investigator

JST ASPIRE FOR RISING SCIENTISTS

The Sumitomo Foundation, Grant for Basic Science Research

The Hattori Hokokai Foundation, Engineering Research Encouragement Grant

Murata Science Foundation, Research Grant

JST FOREST

Yazaki Memorial Foundation for Science and Technology, General Research Grant

JSPS KAKENHI, Early-Career Scientists

JST PRESTO

Committee and Advisory Activities

Teaching Experience

Publications

2026

2025

2024

2023

2021

2019

2018

2017

2016

2015

2014

2013

2012