RIKEN Center for Quantum Computing Floating-Electron-Based Quantum Information RIKEN Hakubi Research Team

RIKEN Hakubi Team Leader: Erika Kawakami (Ph.D.)

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Research Summary

Our team is working on the application of electrons floating on liquid helium to quantum information. This physical system has a high potential for providing an ideal platform on which to realize a quantum computer, due to the fact that it is free of impurities and defects. We are also working on the technological development required for large-scale quantum computation.

Main Research Fields

Engineering

Related Research Fields

Interdisciplinary Science & Engineering
Mathematical & Physical Sciences
Applied physics
Nano/Micro science
Electrical and electronic engineering

Keywords

low-temperature physics
quantum computer
quantum bit
two-dimensional electron system
helium

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

1. A. Jennings, X. Zhou, I. Grytsenko, E. Kawakami,
"Quantum computing using floating electrons on cryogenic substrates: Potential And Challenges"
Applied Physics Letters 124, 120501 (2024).
2. E. Kawakami, J. Chen, M. Benito, and D. Konstantinov,
"Blueprint for quantum computing using electrons on helium"
Physical Review Applied 20, 054022 (2023).
3. *E. Kawakami, A. Elarabi, and D. Konstantinov,
"Relaxation of the excited Rydberg States of Surface Electrons on Liquid Helium"
Physical Review Letters, 126, 106802 (2021).
4. *A. Elarabi, E. Kawakami, and D. Konstantinov,
"Cryogenic amplification of image-charge detection for readout of quantum states of electrons on liquid helium"
Journal of Low Temperature Physics 202, 456 (2021).
5. *E. Kawakami, A. Elarabi, D. Konstantinov,
"Image-charge detection of the Rydberg states of surface electrons on liquid helium"
Physical Review Letters 123, 086801 (2019).
6. *J. P. G. van Dijk, E. Kawakami, R. N. Schouten, M. Veldhorst, L. M. K. Vandersypen, M. Babaie, E. Charbon, and F. Sebastiano,
"The impact of classical control electronics on qubit fidelity"
Physical Review Applied 12, 044054 (2019).
7. *T. F. Watson, S. G. J. Philips, E. Kawakami, D. R. Ward, P. Scarlino, M. Veldhorst, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, L. M. K. Vandersypen,
"A programmable two-qubit quantum processor in silicon"
Nature 555, 633 (2018).
8. *E. Kawakami, T. Jullien, P. Scarlino, D. R. Ward, D. E. Savage, M. G. Lagally, Viatcheslav Dobrovitski, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, L. M. K. Vandersypen,
"Gate fidelity and coherence of an electron spin in a Si/SiGe quantum dot with micromagnet"
Proceedings of the National Academy of Sciences of the United States of America 113, 42, 11738 (2016).
9. *P. Scarlino, E. Kawakami, D. R. Ward, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, L. M. K. Vandersypen,
"Second harmonic coherent driving of a spin qubit in Si/SiGe single quantum dot"
Physical Review Letters 115, 106802 (2015).
10. *E. Kawakami, P. Scarlino, D. R. Ward, F. R. Braakman, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, L. M. K. Vandersypen,
"Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot"
Nature Nanotechnology 9, 666 (2014).

Lab Members

Principal investigator

Erika Kawakami: RIKEN Hakubi Team Leader

Core members

Ivan Grytsenko: Technical Scientist
Asher Curtis JENNINGS: Postdoctoral Researcher
Jun Wang: Postdoctoral Researcher
Kimitoshi Kono: Senior Visiting Scientist
Hiroki Ikegami: Visiting Scientist
Yiran Tian: International Program Associate

Contact Information

Email: erika.kawakami@riken.jp