Fig. 1: Schematics of the experiment setup for null-biased fiber-optic control of the qubit state.
From: Manipulations of a transmon qubit with a null-biased electro-optic fiber link
At the room temperature, the vector microwave signal generated by IQ mixing serves as the modulation voltage for the EOM. The modulated optical signal is then transmitted through an optical fiber (red line) to the cryogenic environment. Upon reaching the low temperature, a photodetector converts it to a microwave signal which is used to drive the qubit. In the dashed box, the green part is the coplanar waveguide transmission line, the pink part is a resonator and the yellow part is a transmon qubit.
