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.T. Otsuka, T. Nakajima, M. R. Delbecq, S. Amaha, J. Yoneda, K. Takeda, G. Allison, T. Ito, R. Sugawara, A. Noiri, A. Ludwig, A. D. Wieck, and S. Tarucha,
"Single-electron Spin Resonance in a Quadruple Quantum Dot",
Scientific Reports 6 31820 (2016)
2.K. Takeda, J. Kamioka, T. Otsuka, J. Yoneda, T. Nakajima, M. R. Delbecq, S. Amaha, G. Allison, T. Kodera, S. Oda, and S. Tarucha,
"A fault-tolerant addressable spin qubit in a natural silicon quantum dot",
Science Advances 2 e1600694 (2016)
3.A. Noiri, J. Yoneda, T. Nakajima, T. Otsuka, M. R. Delbecq, K. Takeda, S. Amaha, G. Allison, A. Ludwig, A. D. Wieck, S. Tarucha,
"Coherent electron-spin-resonance manipulation of three individual spins in a triple quantum dot",
Appl. Phys. Lett. 108 153101 (2016)
4.M.R. Delbecq, T. Nakajima, P. Stano, T. Otsuka, S. Amaha, J. Yoneda, K. Takeda, G. Allison, A. Ludwig, A.D. Wieck, and S. Tarucha.:
"Quantum dephasing in a gated GaAs triple quantum dot due to non-ergodic noise"
Phys. Rev. Lett. 116, 0468020 (2016)
5.I. Sohn, S. Tarucha, and B.S. Choi,
"Analysis of physical requirements for simple three-qubit and nine-qubit quantum error correction on quantum-dot and superconductor qubits",
Phys. Rev. A 95, No. 1, pp.012306-1-7, 2017.
6.S. Hermelin, B. Bertrand, S. Takada, M. Yamamoto, S. Tarucha, A. Ludwig, A.D. Wieck, C. Bäuerle, and T. Meunier,
"Classical information transfer between distant quantum dots using individual electrons in fast moving quantum dots",
Phys. Status Solidi B 254, No. 3, pp.1600673-1-12 (2017).
7.T. Ito, T. Otsuka, S. Amaha, M.R. Delbecq, T. Nakajima, J. Yoneda, K. Takeda, G. Allison, A. Noiri, K. Kawasaki, and S. Tarucha,
"Detection and control of charge states in a quintuple quantum dot",
Scientific Reports 6, pp. 39113-1-7 (2016).
8.T. Fujita, P. Stano, G. Allison, K. Morimoto, Y. Sato, M. Larsson, J.-H. Park, A. Ludwig, A.D. Wieck, A. Oiwa, and S. Tarucha,
"Signatures of hyperfine, spin-orbit, and decoherence effects in a Pauli spin blockade",
Phys. Rev. Lett. 117, No. 20, pp.206802-1-6 (2016).
9.H. Kiyama, T. Nakajima, S. Teraoka, A. Oiwa, and S. Tarucha,
"Single-shot ternary readout of two-electron spin states in a quantum dot using spin filtering by quantum Hall edge states",
Phys. Rev. Lett. 117, No.23, pp.236802-1-5 (2016).
10.Y. Yamaoka, K. Iwasaki, S. Oda and T. Kodera
"Charge sensing and spin-related transport property of p-channel silicon quantum dots"
Jpn. J. Appl. Phys. 56, 04CK07-1-4, 2017