2025/05/05 by Andrea Secchi, Gaia Forghieri, Secchi, Andrea +9 · 1 citation
#cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.48550/arxiv.2505.02449
The intense simulation efforts on hole-spin qubits in germanium have so far focused primarily on singly occupied quantum dots. Here, we theoretically investigate three-hole qubits in germanium and demonstrate that their performance can rival that of single-hole qubits in both strained and unstrained systems. In particular, we find that -- in the widely used quasi-circular geometry -- a three-hole qubit encoding can yield enhancements of the Rabi frequencies of up to two orders of magnitude and a large advantage also in terms of quality factors.