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. *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).
2. *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 volume 202, 456 (2021).
3. *E. Kawakami, A. Elarabi, D. Konstantinov.:
"Image-charge detection of the Rydberg states of surface electrons on liquid helium"
Physical Review Letters with Editors’ Suggestion, 123, 086801 (2019).
4. *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).
5. *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).
6. *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, and 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).
7. *P. Scarlino, E. Kawakami, D. R. Ward, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson and L. M. K. Vandersypen.:
"Second harmonic coherent driving of a spin qubit in Si/SiGe single quantum dot"
Physical Review Letters 115, 106802 (2015).
8. *E. Kawakami, P. Scarlino, D. R. Ward, F. R. Braakman, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, and L. M. K. Vandersypen.:
"Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot"
Nature Nanotechnology 9, 666-670 (2014).
9. *P. Scarlino, E. Kawakami, P. Stano, M. Shafiei, C. Reichl, W. Wegscheider, L. M. K. Vandersypen.:
"Spin relaxation anisotropy in a GaAs quantum dot"
Physical Review Letters with Editors’ Suggestion, 113, 256802 (2014).
10. *E. Kawakami, P. Scarlino, L. R. Schreiber, J. R. Prance, D. E. Savage, M. G. Lagally, M. A. Eriksson, L. M. K. Vandersypen.:
"Excitation of a Si/SiGe quantum dot using an on-chip microwave antenna"
Applied Physics Letters 103, 132410 (2013).

Lab Members

Principal investigator

Erika Kawakami: RIKEN Hakubi Team Leader

Core members

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

Contact Information

Email: erika.kawakami [at] riken.jp