Viatcheslav Dobrovitski,
The Ames Laboratory, Iowa State University
Understanding and controlling quantum spins in solids is an exciting scientific endeavor. Besides fundamental interest in non-equilibrium many-spin dynamics, this research is important for applications in nanomagnetism, spintronics, quantum information, and advanced sensing at nanoscale. Recently, the nitrogen-vacancy (NV) centers in diamond have recently emerged as a particularly promising platform for future solid-state quantum technologies. I will present our recent work on quantum spin dynamics and control of individual electronic and nuclear spins in diamond, which protects coherence of quantum spins at long times. I will discuss controlling and protecting the coherent dynamics of coupled spins, which enables highly accurate quantum gates on spin qubits in diamond, and implementing the quantum search algorithm using single solid-state spins [1]. Further extending this approach to the few-qubit case, we have demonstrated an extremely sensitive nanoscale tomography with single-spin resolution [2], and an improved tomography based on continuous Rabi driving. Finally, I will discuss how these advances can make possible multi-qubit quantum registers for the small-scale quantum information processing in diamond.
[1] T. van der Sar, Z. H. Wang, M. S. Blok, H. Bernien, T. H. Taminiau, D. M. Toyli, D. A. Lidar, D. D. Awschalom, R. Hanson, and V. V. Dobrovitski, Nature 484, 82 (2012).
[2] T. H. Taminiau, J. J. T. Wagenaar, T. van der Sar, F. Jelezko, V. V. Dobrovitski, and R. Hanson, Phys. Rev. Lett. 109, 137602 (2012).