RIKEN Center for Emergent Matter Science Quantum Functional System Research Group

Group Director: Seigo Tarucha (D.Eng.)

Japanese Page

Research Summary

Hardware and underlying physics for quantum information processing with quantum control of soli-state quantum states are studied. Quantum information processing is an ideal information technology whose operation accompanies low-energy dissipation and high information security. The purpose of this laboratory is to demonstrate ability of the solid-state information processing using quantum operations of quantum coherence and entanglement in semiconductor and superconductor nanostructures and finally outline a path for the realization. The specific research targets are"quantum computing"including quantum logic operation and quantum simulation, "quantum interface" which can offer quantum memory and relay, and "quantum nanodevices"relavent for the quantum control. Architectures for best suited quantum systems, science and technology for both materials and devices, and fundamental physics of quantum entanglement decoherence and spin correlation are investigated.

Main Research Fields

Mathematical & Physical Sciences

Related Research Fields

Informatics
Engineering

Keywords

Semiconductor quantum dots
Quantum wire
Quantum computation
Topological quantum computation
Quantum transport

Selected Publications

1. K. Takeda, A. Noiri, T. Nakajima, L. C. Camenzind, T. Kobayashi, A. Sammak, G. Scappucci, and S. Tarucha,
"Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99%",
npj Quantum Info. 10, 22 (2024).
2. Y. del Valle Inclan Redondo, X. Xu, T. C. H. Liew, E. A. Ostrovskaya, A. Stegmaier, R. Thomale, C. Schneider, S. Klembt, S. Hofling, S. Tarucha and M. D. Fraser,
"Nonreciprocal bandstructures in an exciton-polariton Floquet optical lattice",
Nature Photonics (2024) accepted.
3. J. Yoneda, J. S. Rojas-Arias, P. Stano, K. Takeda, A.Noiri, T. Nakajima, D. Loss, and S. Tarucha,
"Noise-correlation spectrum for a pair of spin qubits in silicon",
Nature Physics 19, 1793-1798, Oct (2023).
4. S. Matsuo, T. Imoto, T. Yokoyama, Y. Sato, T. Lindemann, S. Gronin, G.C. Gardner, M.J. Manfra, and S. Tarucha,
"Josephson diode effect derived from short-range coherent coupling",
Nature Physics 19, 1636 (2023).
5. A.Noiri, K. Takeda, T. Nakajima, T. Kobayashi, A. Sammak, G. Scappucci, and S. Tarucha,
"A shuttling-based two-qubit logic gate for linking distant silicon quantum processors",
Nature Commun. 13, 5740 (2022).
6. K. Takeda, A. Noiri, T. Nakajima, T. Kobayashi, and S. Tarucha,
"Quantum error correction with silicon spin qubits”
Nature 608, 682 (2022)
7. A. Noiri, K. Takeda, T. Nakajima, T. Kobayashi, A. Sammak, G. Scappucci, and S. Tarucha,
"Fast universal quantum gate above the fault-tolerance threshold in silicon",
Nature 601, 338 (2022).
8. K. Takeda, A. Noiri, T. Nakajima, J. Yoneda, T. Kobayashi, and S. Tarucha,
"Quantum tomography of an entangled three-qubit state in silicon”
Nat. Nanotechnol. 16. 965 (2021).
9. T. Nakajima, A. Noiri, K. Kawasaki, J. Yoneda, P. Stano, S. Amaha, T. Otsuka, K. Takeda, M.R. Delbecq, G. Allison, A. Ludwig, A. D. Wieck, D. Loss, and S. Tarucha,
"Coherence of a driven electron spin qubit actively decoupled from quasi-static noise",
Phys. Rev. X 10, 011060-1-11 (2020).
10. J. Yoneda, K. Takeda, T. Otsuka, T. Nakajima, M. R. Delbecq, G. Allison, T. Honda, T. Kodera, S. Oda, Y. Hoshi, N. Usami, K. M. Itoh, and S. Tarucha,
"A quantum-dot spin qubit with coherence limited by charge noise and fidelity higher than 99.9%",
Nature. Nanotechnol. 13, 102 (2018).