A dressed singlet-triplet qubit in germanium

Resonantly driven and continuously dressed $S$–$T_0$ hole-spin qubit in a germanium double quantum dot operated at low magnetic field and the detuning symmetry point.

Key Results

• 99.68(2)% average physical-gate fidelity with $T_2^{\ast }=1.9\mu$s for the bare resonantly driven qubit.
• Dressing increased rotating-frame coherence to $T_{2\rho }^{\ast }=20.3\mu$s while retaining 99.63(7)% gate fidelity.

Links

• Journal: Nature Communications
• arXiv: 2501.14627

Zoo Links

• singlet-triplet-qubit