Event Date and Time
Marko Lončar, John A. Paulson School of Engineering and Applied Sciences, Harvard University
Optically addressable electronic spin qubits associated with color centers in diamond have recently emerged as a promising quantum memory platform. While direct magnetic dipole interactions between these qubits are possible, they are hard to realize since they require deterministic placement of color centers within few nm of each other. An alternative approach takes advantage of photon-mediated interactions between spin qubits, using the cavity QED approach. In my talk, I will discuss the progress towards the development of efficient spin-photon interfaces for silicon-vacancy (SiV) color center in diamond with the goal of realizing quantum repeaters. Combined effects of strong spin-orbit coupling and large orbital response to applied strain fields of SiV result in a very large strain susceptibility of SiV electron spin. This offers a unique opportunity to control the spin using strain and to interface two or more SiV qubits using coherent phonons and acoustic vibration in general. I will review several strategies to control SiV spin using DC and AC strain fields, and present progress towards the realization of phonon mediated entanglement between two (or more) SiV spins.