Optimizing photon-mediated operations using external control fields*

A variety of systems have been successfully implemented as qubits for quantum information processing. Many of these systems offer specific benefits and can be used advantageously for particular functions in a large scale hybrid quantum platform. In this context, optimal light-matter interfaces between different quantum systems is essential. In this talk, we will examine how spectral properties of quantum emitters can be controlled with external field protocols. In particular we will discuss two-photon interference between different quantum emitters that can be hindered by spectral differences between the systems. This problem is exacerbated in solid state systems where fluctuations in the surrounding environment leads to spectral diffusion. We will show that external field protocols can mitigate spectral diffusion for emitters in dynamic environments. We will also show that these protocols can restore photon indistinguishability between otherwise spectrally different quantum emitters and thus improve the efficiency of essential two-photon interference operations.