Extended Data Fig. 2: SWAP oscillations between the two distant spins, using single-dot EDSR instead of the flopping-mode regime to excite qubit 2.
From: Cavity-mediated iSWAP oscillations between distant spins
a. The operation regime is similar as in Fig. 3b,d, with gs,1(2)/2π ≈ 21.5 MHz and Δ2s,1(2)/2π ≈ 65.5 MHz. The solid lines represent fits to the dispersive Hamiltonian model of Eq. (1), from which we extract an interaction strength 2J/2π of 11.1 MHz. Note the visibility of qubit 2 is off-set compared to all other measurements (both traces being plotted on different scales). The exact mechanism is unknown, but we have verified that it is caused by the increased power of the microwave burst necessary to drive the qubit in a single dot. Each data point is averaged for 106 times. b. Pulse sequence similar to Fig. 3a, with the difference being that the MW drive is now resonant with qubit 2 when pulsed to a single dot, to prepare \(\left\vert 01\right\rangle\). The data points in a are averaged for 106 times.
