  Recent efforts have demonstrated the first prototypes of compact and
programmable photonic quantum computers~(PQCs). Utilization of time-bin
encoding in loop-like architectures enabled a programmable generation of
quantum states and execution of different~(programmable) logic gates on a
single circuit. Actually, there is still space for better compactness and
complexity of available quantum states: photonic circuits~(PCs) can function at
different frequencies. This necessitates an optical component, which can make
different frequencies talk with each other. This component should be integrable
into PCs and be controlled -- preferably -- by voltage for programmable
generation of multifrequency quantum states and PQCs. Here, we propose a device
that controls a four-wave mixing process, essential for frequency combs. We
utilize nonlinear Fano resonances. Entanglement generated by the device can be
tuned continuously by the applied voltage which can be delivered to the device
via nm-thick wires. The device is integrable, CMOS-compatible, and operates
within a timescale of hundreds of femtoseconds.
