Technical University Munich
Walter Schottky Institute
Am Coulombwall 4
Tel. +49 89 289 12777
Research focus: quantum sensing, NMR spectroscopy, NV centers
Nuclear magnetic resonance spectroscopy of nanoscale samples
As its core goal, the group aims to perform nuclear magnetic resonance (NMR) spectroscopy on single biomolecules by employing a single NV center in diamond to detect the NMR signal.
 T. Staudacher et al., Science 339, 561 (2013)
 H.J. Mamin et al., Science 339, 557 (2013)
Decoherence of spin qubits in a soft matter environment
Sensing applications require NV centers to be placed in close proximity to nanoscale objects such as biomolecules, where they are subject to strong decoherence from fluctuating charges and spins. Considerable work in the group is directed towards identifying these sources and mitigating their impact by suitable measurement protocols. We equally work towards using decoherence as a novel signal source in sensing experiments.
 F. Reinhard et al., Phys. Rev. Lett. 108, 200402 (2012)
Quantum sensoring protocols
We also work on novel protocols to sensitize our sensor to different physical quantities or to render it robust against unwanted fluctuations of experimental parameters. This includes e.g. optimal control protocols to enable robust measurements in presence of fluctuations on the laser and microwave excitation sources. In the future, we plan to study schemes that exploit quantum features such as the use of single nuclear spins as quantum memories to store measurement results.
 T. Häberle et al., Phys. Rev. Lett. 111, 170801 (2013)