Details

Autor(en) / Beteiligte

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

Titel

Smooth Optimal Quantum Control for Robust Solid-State Spin Magnetometry

Ist Teil von

• Physical review letters, 2015-11, Vol.115 (19), p.190801-190801, Article 190801

Ort / Verlag

United States

Erscheinungsjahr

2015

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.