An electrically driven single-atom 'flip-flop' qubit

First experimental demonstration of coherent microwave-electric control of a single ${}^{31}\text{P}$ electron-nuclear flip-flop qubit in silicon.

Key Results

• Demonstrated a $118.5(2.5)\text{kHz}$ flip-flop Rabi frequency through hyperfine Stark modulation.
• Measured an average native one-qubit gate fidelity of $98.4(2)\%$ by randomized benchmarking.
• Measured $T_1^{\mathrm{ff}}=173(12)\text{s}$, Ramsey $T_2^{\ast }=4.09(88)\mu \text{s}$, and Hahn-echo $T_2^{\mathrm{H}}=184(24)\mu \text{s}$.
• Did not reach the donor-interface large-dipole regime or demonstrate a two-qubit gate.

Links

• DOI: 10.1126/sciadv.add9408
• arXiv: 2202.04438

Cited In

• flip-flop-qubit