Coherence of a field-gradient-driven singlet-triplet qubit coupled to many-electron spin states in 28Si/SiGe

Field-gradient-driven $S$–$T_0$ operation in an isotopically enriched silicon double quantum dot with an on-chip micromagnet.

Key Results

• Approximately 100 MHz singlet-triplet oscillations.
• Oscillation quality factor above 580.
• $T_2^{\ast }<1\mu$s in the reported weak-field ergodic regime.

Links

• Journal: npj Quantum Information
• arXiv: 2310.12603

Zoo Links

• singlet-triplet-qubit