RIKEN Center for Emergent Matter Science Semiconductor Quantum Information Device Theory Research Team
Team Leader: 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
- Condensed Matter Physics I
- Quantum dots
- Spin-based quantum information science
- Spin-orbit interaction
- Quantum information processing
Papers with an asterisk(*) are based on research conducted outside of RIKEN.
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).
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).
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).
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).
*D. Loss and D. DiVincenzo:
"Quantum computation with quantum dots"
Phys. Rev. A 57, 120 (1998).
- Daniel Loss
- Team Leader
Main Research Building, Room 148
Email: loss.daniel [at] riken.jp