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RIKEN Center for Quantum Computing Semiconductor Quantum Information Device Theory Research Team

Team Leader: Daniel Loss (Ph.D.)

Research Summary

Daniel Loss (Ph.D.)

Our team is working on the theory of a spin-based quantum computer. We design its CMOS-compatible components deriving from Si and Ge gated quantum dots. We focus on spin qubits that can be manipulated by electric fields through various spin-orbit interactions. Using advanced bandstructure models, we investigate the properties of holes and electrons confined in low-dimensional geometries. We search for optimal setups and ways of protecting the qubits from noise. We analyze perspective qubit interconnects which would allow assembling a large number of qubits into networks. Our ultimate goal is to identify fast, small, and scalable elements of the future quantum computer.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Engineering
  • Condensed Matter Physics I

Keywords

  • Quantum dots
  • Spin-based quantum information science
  • Qubit
  • Spin-orbit interaction
  • Quantum information processing

Selected Publications

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

  • 1. P. Stano, Ch-H. Hsu, L. C. Camenzind, L. Yu, D. M. Zumbühl and D. Loss:
    "Orbital effects of a strong in-plane magnetic field on a gate-defined quantum dot"
    Phys. Rev. B 99, 085308 (2019).
  • 2. L. C. Camenzind, L. Yu, P. Stano, J. Zimmerman, A. C. Gossard, D. Loss and D. M. Zumbühl:
    "Hyperfine-phonon spin relaxation in a single-electron GaAs quantum dot."
    Nat. Commun. 9, 3454 (2018).
  • 3. P. Stano, Ch-H. Hsu, M. Serina, L. C. Camenzind, L. Yu, D. M. Zumbühl and D. Loss:
    "g-factor of electrons in gate-defined quantum dots in a strong in-plane magnetic field"
    Phys. Rev. B 98, 195314 (2018).
  • 4. O. Malkoc, P. Stano and D. Loss:
    "Optimal geometry of lateral GaAs and Si/SiGe quantum dots for electrical control of spin qubits"
    Phys. Rev. B 93, 235413 (2016).
  • 5. *D. Loss and D. DiVincenzo:
    "Quantum computation with quantum dots"
    Phys. Rev. A 57, 120 (1998).

Related Links

Lab Members

Principal investigator

Daniel Loss
Team Leader

Core members

Juan Sebastian Rojas Arias
Postdoctoral Researcher

Contact Information

Main Research Building, Room 148
2-1 Hirosawa,
Wako, Saitama,
351-0198 Japan
Email: loss.daniel [at] riken.jp

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