Chu, Yiwen

Monday Oct 14, 2013
Time: 14:00
Place: ETH Science City, HPF G6
Host: Andreas Wallraff

Quantum control of interactions between spins and photons in diamond

Yiwen Chu
Department of Physics, Harvard University, Cambridge, MA, USA

The nitrogen vacancy center in diamond is a unique quantum system that combines solid state spin qubits with coherent optical transitions. While control of the NV center's spin states with RF fields has led to a wide range of demonstrations from quantum error correction to high-sensitivity magnetometry, my talk will focus on our work to create an interface between NV centers and light in the visible range. I will begin by discussing the first demonstration of entanglement between a solid state qubit and an optical photon. This work has enabled a variety of experiments including remote NV-NV entanglement for quantum networks and optical control of nuclear spin states. However, the feasibility of future experiments depends crucially on our ability to implement scalable and efficient systems that make use of the NV center's optical properties. This will be the topic of the remainder of my talk, where I will describe our recent work to enhance NV-light interactions by creating diamond-based nanoscale photonic devices.