RIKEN Center for Emergent Matter Science Superconducting Quantum Electronics Joint Research Unit
Unit Leader: Eisuke Abe (D.Sci.)
We develop quantum technologies based on superconducting devices, with particular emphasis on the development of multi-qubit quantum computers. We aim to implement superconducting qubits (quantum bits) and functionalities for coherent control and non-demolition measurement of quantum states via microwaves on a superconducting quantum circuit consisting of Josephson junctions, microwave transmission lines, microwave cavities, Josephson parametric amplifiers, and so on, and to bring a quantum computer which executes computations intractable with classical computers closer to reality.
Main Research Fields
- Mathematical & Physical Sciences
Related Research Fields
- Interdisciplinary Science & Engineering
- Applied physics
- Electrical and electronic engineering
- Superconducting circuit
- Quantum computing
- Quantum technology
- Microwave engineering
- Quantum entanglement
Papers with an asterisk(*) are based on research conducted outside of RIKEN.
- 1.*K. Sasaki, K. M. Itoh, and E. Abe.:
“Determination of the position of a single nuclear spin from free nuclear precessions detected by a solid-state quantum sensor”
Physical Review B 98, 121405 (2018).
- 2.*E. Abe and K. Sasaki.:
“Tutorial: Magnetic resonance with nitrogen-vacancy centers in diamond?microwave engineering, materials science, and magnetometry”
Journal of Applied Physics 123, 161101 (2018).
- 3.*K. Ito, H. Saito, K. Sasaki, H. Watanabe, T. Teraji, K. M. Itoh, and E. Abe.:
“Nitrogen-vacancy centers created by N+ ion implantation through screening SiO2 layers on diamond”
Applied Physics Letters 110, 213105 (2017).
- 4.*K. Sasaki, E. E. Kleinsasser, Z. Zhou, W.-D. Li, H. Watanabe, K.-M. C. Fu, K. M. Itoh, and E. Abe.:
“Dynamic nuclear polarization enhanced magnetic field sensitivity and decoherence spectroscopy of an ensemble of near-surface nitrogen-vacancy centers in diamond”
Applied Physics Letters 110, 192407 (2017).
- 5.*J. Herrmann, M. A. Appleton, K. Sasaki, Y. Monnai, T. Teraji, K. M. Itoh, and E. Abe.:
“Polarization- and frequency-tunable microwave circuit for selective excitation of nitrogen-vacancy spins in diamond”
Applied Physics Letters 109, 183111 (2016).
- 6.*K. Sasaki, Y. Monnai, S. Saijo, R. Fujita, H. Watanabe, J. Ishi-Hayase, K. M. Itoh, and E. Abe.:
“Broadband, large-area microwave antenna for optically detected magnetic resonance of nitrogen-vacancy centers in diamond”
Review of Scientific Instruments 87, 053904 (2016).
- 7.*E. S. Petersen, A. M. Tyryshkin, J. J. L. Morton, E. Abe, S. Tojo, K. M. Itoh, M. L. W. Thewalt, and S. A. Lyon.:
“Nuclear spin decoherence of neutral 31P donors in silicon: Effect of environmental 29Si nuclei”
Physical Review B 93, 161202 (2016).
- 8.*L. Yu, C. M. Natarajan, T. Horikiri, C. Langrock, J. S. Pelc, M. G. Tanner, E. Abe, S. Maier, C. Schneider, S. Hofling, M. Kamp, R. H. Hadfield, M. M. Fejer, and Y. Yamamoto.:
“Two-photon interference at telecom wavelengths for time-bin-encoded single photons from quantum-dot spin qubits”
Nature Communications 6, 8955 (2015).
- 9.*K. De Greve, P. L. McMahon, L. Yu, J. Pelc, C. Jones, C. M. Natarajan, N. Y. Kim, E. Abe, S. Maier, C. Schneider, M. Kamp, S. Hofling, R. H. Hadfield, A. Forchel, M. M. Fejer, and Y. Yamamoto.:
“Complete tomography of a high-fidelity solid-state entangled spin-photon qubit pair”
Nature Communications 4, 2228 (2013).
- 10.*K. De Greve, L. Yu, P. L. McMahon, J. Pelc, C. M. Natarajan, N. Y. Kim, E. Abe, S. Maier, C. Schneider, M. Kamp, S. Hofling, R. H. Hadfield, A. Forchel, M. M. Fejer, and Y. Yamamoto.:
“Quantum-dot spin-photon entanglement via frequency downconversion to telecom wavelength”
Nature 491, 421 (2012).
- Eisuke Abe
- Unit Leader