Portal de Periódicos da CAPES

Smooth Optimal Quantum Control for Robust Solid-State Spin Magnetometry

2015; American Physical Society; Volume: 115; Issue: 19 Linguagem: Inglês

10.1103/physrevlett.115.190801

1092-0145

Tobias Nöbauer, Andreas Angerer, Björn Bartels, Michael Trupke, Stefan Rotter, Jörg Schmiedmayer, Florian Mintert, Johannes Majer,

Electronic and Structural Properties of Oxides

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 2 orders of magnitude for a normalized detuning as large as 40%, achieving a value of 20 nT Hz(-1/2) μm(3/2) in sensitivity times square root volume.