Building a hybrid quantum system between a trapped ion and solid state donor qubit via path-erasure measurement-based heralded entanglement

We present progress on generating remote entanglement between a qubit encoded in the hyperfine ground state of ¹⁷¹Yb+ and another qubit implemented via the spin of a donor bound electron in ZnO. Such a system would allow a hybrid quantum device to leverage long ion coherence time with fast solid state gate times. The schema makes use of the close optical transitions accessible in both qubits to implement photonic transduction of the quantum state. By synchronizing excitation pulses and engineering the frequency and waveform of the emitted photons, measurement-based heralded entanglement can be generated by path erasure of the photon source. Our presentation will focus on recent work towards Yb photon shaping and high efficiency coupling of ion light to a single mode fiber.