Microwave Spin Control of a Tin-Vacancy Qubit in Diamond*

The negatively charged tin-vacancy (SnV−) center in diamond is an emerging platform for building the next generation of quantum networks due to its high quantum efficiency, strong zero phonon emission, and reduced sensitivity to electrical noise. The SnV− has a large spin-orbit coupling compared to the related silicon vacancy center in diamond (SiV-). This allows for long spin lifetimes at elevated temperatures, but suppresses the magnetic dipole transitions desired for quantum control. By use of a naturally strained center, we overcome this limitation to achieve fast, high fidelity microwave spin control on a single SnV- spin. Here, we discuss these results along with our ongoing work towards improved spin performance, improved spin readout, and integrated devices that combine spin control and nanophotonics. These results pave the way for SnV− spins to be used as a building block for future quantum technologies.