A QRAM is a quantum memory in which one can read or write quantum information to a superposition
of memory cells. Such a device is powerful as a tool for implementing a plethora of quantum
algorithms and is regarded by many as essential for a future quantum computer. It has also proved
di&cult to realise due to the complexity of implementing the quantum addressing of quantum
storage. This PhD work takes part in an e,ort aimed at using recently developed techniques in single
spin detection, spectroscopy and coherent control to demonstrate a quantum router, the unit cell of a
QRAM, using electron and nuclear spins in the solid state. The PhD work will consist of implementing
CSWAP gates schemes on Erbium defects in calcium tungstate in order to demonstrate a four-qubit
QRAM unit cell.