Centers & Labs

RIKEN Center for Emergent Matter Science

Quantum System Theory Research Team

Team Leader: Daniel Loss (Ph.D.)
Daniel  Loss(Ph.D.)

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 Field

Physics

Research Subjects

  • Spin and phase-coherent phenomena in semiconducting and magnetic nanostructures
  • spin qubits, decoherence, Cooper pair splitter, many-body effects and nuclear spins
  • quantum computing and quantum coherence
  • Majorana fermions and topological states of matter

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. F. Nichele, S. Chesi, S. Hennel, A. Wittmann, Ch. Gerl, W. Wegscheider, D. Loss, T. Ihn, and K. Ensslin:
    "Characterization of spin-orbit interactions of GaAs heavy holes using a quantum point contact"
    Phys. Rev. Lett. 113, 046801 (2014)
  8. P. Scarlino, E. Kawakami, P. Stano, M. Shafiei, C. Reichl, W. Wegscheider, and L. M. K. Vandersypen:
    "Spin relaxation anisotropy in a GaAs quantum dot"
    Phys. Rev. Lett. 113, 256802 (2014) (Editor's Suggestion)
  9. T. Meng, P. Stano, J. Klinovaja, and D. Loss:
    "Helical nuclear spin order in a strip of stripes in the Quantum Hall regime"
    Eur. Phys. J. B 87, 203 (2014)

Lab Members

Principal Investigator

Daniel Loss
Team Leader

Core Members

Peter Stano
Senior Scientist
Andrej Gendiar
Research Scientist
Guang Yang
Postdoctoral Researcher
Chen-Hsuan Hsu
Postdoctoral Researcher

Contact information

2-1 Hirosawa, Wako, Saitama
351-0198 Japan

Email: loss.daniel [at] riken.jp

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