Numerical Optimization of Two-Qubit Gates in Silicon Flip-Flop Qubit Arrays under Electrical Control

Spin-orbital simulation and control-optimization study for electrically driven two-qubit gates in flip-flop arrays.

Key Results

• Used Makhlin invariants to identify operations locally equivalent to $\sqrt{i\mathrm{SWAP}}$ and $i\mathrm{SWAP}$.
• Predicted isolated-pair composite-gate infidelities of $4.72\times 10^{-4}$ and $6.14\times 10^{-4}$ after local $R_z$ phase compensation.
• Found that idle spectators distort the nonlocal interaction and require geometry-aware recalibration.

Links

• arXiv: 2607.29123

Cited In

• flip-flop-qubit