RIKEN Center for Emergent Matter Science Quantum System Theory Research Team

Team Leader: Daniel Loss (Ph.D.)

Japanese Page

Research Summary

Quantum System Theory Research Team is working on the quantum theory of condensed matter with a focus on spin and phase coherent phenomena in semiconducting and magnetic nanostructures. In particular, the team investigates the fundamental principles of quantum information processing in the solid state with a focus on spin qubits, superconducting qubits, and Majorana fermions. This involves the study of decoherence in many-body systems and scalable quantum computing architectures based on surface codes and long-distance entanglement schemes. The group also studies nuclear spin phases and many-body effects in low-dimensional systems with spin orbit interaction, and quantum transport of magnetization.

Main Research Fields

Mathematical & Physical Sciences

Related Research Fields

Engineering

Keywords

solid state physics
semiconducting nanostructures
quantum computing
topological quantum effects
spintronics

Selected Publications

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

1.* D. Loss and D.P. DiVincenzo:
"Quantum computation with quantum dots"
Phys. Rev. A 57, 120 (1998)
2.* M.N. Leuenberger and D. Loss:
"Quantum computing in molecular magnets"
Nature 410, 789 (2001)
3.* B. Coish and D. Loss:
"Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics"
Phys. Rev. B 70, 195340 (2004)
4.* P. Recher, E.V. Sukhorukov, and D. Loss:
"Andreev-Tunneling, Coulomb Blockade, and Resonant Transport of Non-Local Spin-Entangled Electrons"
Phys. Rev. B 63, 165314 (2001)
5.* J. Klinovaja, P. Stano, A. Yazdani, and D. Loss:
"Topological Superconductivity and Majorana Fermions in RKKY Systems"
Phys. Rev. Lett. 111, 186805 (2013)
6.S. Chesi, Y.-D. Wang, J. Yoneda, T. Otsuka, S. Tarucha, and D. Loss:
"Single-spin manipulation in a double quantum dot in the field of a micromagnet"
Phys. Rev. B 90, 235311 (2014)
7.S. Chesi, L.-P. Yang, and D. Loss,
"Dephasing due to nuclear spins in large-amplitude electric dipole spin resonance",
Phys. Rev. Lett. 116, 066806 (2016)
8.G. Yang, P. Stano, J. Klinovaja, D. Loss,
"Majorana bound states in magnetic skyrmions",
Phys. Rev. B 93, 224505 (2016)
9.J.-H. Park, G. Yang, J. Klinovaja, P. Stano, D. Loss,
"Fractional boundary charges in quantum dot arrays with density modulation",
Phys. Rev. B 94 , 075416 (2016)
10.G. Yang, Ch.-H. Hsu, P. Stano, J. Klinovaja, D. Loss,
"Long-Distance Entanglement of Spin Qubits via Quantum Hall Edge States",
Phys. Rev. B 93, 075301 (2016)

Recent Research Results

Apr. 10, 2023
Modeling longer-lived holes in silicon quantum dots
Dec. 28, 2018
Hybrid qubits solve key hurdle to quantum computing

Lab Members

Principal investigator

Daniel Loss: Team Leader

Core members

Peter Stano: Senior Scientist
Kazuki Nakazawa: Research Scientist
Guanxiong Qu: Postdoctoral Researcher

Contact Information

2-1 Hirosawa, Wako, Saitama
351-0198 Japan
Email: loss.daniel [at] riken.jp