Details

Autor(en) / Beteiligte

• Jirovec, Daniel
• Mutter, Philipp M
• Hofmann, Andrea
• Crippa, Alessandro
• Rychetsky, Marek
• Craig, David L
• Kukucka, Josip
• Martins, Frederico
• Ballabio, Andrea
• Ares, Natalia
• Chrastina, Daniel
• Isella, Giovanni
• Burkard, Guido
• Katsaros, Georgios

Titel

Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences

Ist Teil von

• Physical review letters, 2022-03, Vol.128 (12), p.126803-126803, Article 126803

Ort / Verlag

United States

Erscheinungsjahr

2022

Quelle

American Physical Society

Beschreibungen/Notizen

• The spin-orbit interaction permits to control the state of a spin qubit via electric fields. For holes it is particularly strong, allowing for fast all electrical qubit manipulation, and yet an in-depth understanding of this interaction in hole systems is missing. Here we investigate, experimentally and theoretically, the effect of the cubic Rashba spin-orbit interaction on the mixing of the spin states by studying singlet-triplet oscillations in a planar Ge hole double quantum dot. Landau-Zener sweeps at different magnetic field directions allow us to disentangle the effects of the spin-orbit induced spin-flip term from those caused by strongly site-dependent and anisotropic quantum dot g tensors. Our work, therefore, provides new insights into the hole spin-orbit interaction, necessary for optimizing future qubit experiments.