Fig. 4: Addressability of quasi-degenerate spins.
From: Entangling gates on degenerate spin qubits dressed by a global field
a Stark shifts of the Larmor frequencies ν1 and ν2 with the voltage on gate P2. b Schematic of double dot and the relevant control knobs P2, J1 and global microwave. c Gate sequence implementing single-qubit y-rotations of both qubits under gate P2 by using a SWAP gate. The gate on Q1 and Q2 have opposite signs. A simplified gate sequence is also shown. d Experimental results and simulations for the sequence in (c). e, f Identical sequence as in (c) and (d) but with equal sign on the single-qubit gates. The single-qubit gates last for six periods of the global field [two periods shown in schematic (c, e)] and the SWAP gate for one period.
