Scalable quantum systems combining spins in semiconductors, optimized photonics, and Floquet engineering

At the core of most quantum technologies, including quantum networks, quantum computers and quantum simulators, is the development of homogeneous, long lived qubits with excellent optical interfaces, and the development of high efficiency and robust optical interconnects for such qubits. To overcome inhomogeneities in semiconductor qubits and in their connections, we have been relying on fast photonics inverse design approach that we have developed and on optimization (Floquet engineering) of the qubits themselves. We illustrate this with our results on color centers in diamond (SiV, SnV) and silicon carbide (VSi in 4H SiC), including efficient and robust photon interfaces and spectrally reconfigurable quantum emitters.