Smooth Optimal Quantum Control for Robust Solid-State Spin Magnetometry.

  title={Smooth Optimal Quantum Control for Robust Solid-State Spin Magnetometry.},
  author={Tobias N{\"o}bauer and Andreas Angerer and Bj{\"o}rn Bartels and Michael Trupke and Stefan Rotter and J{\"o}rg Schmiedmayer and Florian Mintert and Johannes Majer},
  journal={Physical review letters},
  volume={115 19},
We experimentally demonstrate a simple yet versatile optimal quantum control technique that achieves tailored robustness against qubit inhomogeneities and control errors while requiring minimal bandwidth. We apply the technique to nitrogen-vacancy (NV) centers in diamond and verify its performance using quantum process tomography. In a wide-field NV center magnetometry scenario, we achieve a homogeneous sensitivity across a 33% drop in control amplitude, and we improve the sensitivity by up to… CONTINUE READING