Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 24: Quantum Information: Solid State Systems I
Q 24.5: Vortrag
Dienstag, 7. März 2017, 15:45–16:00, P 3
Multi-qubit quantum memories for improved quantum sensing — •Nikolas Abt1, Sebastian Zaiser1, Philipp Neumann1, Ville Bergholm2, Thomas Schulte-Herbrüggen2, and Jörg Wrachrup1 — 13rd Institute of Physics, University of Stuttgart, Germany — 2Department of Chemistry, Technical University Munich, Germany
Single nitrogen-vacancy (NV) centers in diamond are nanoscale quantum sensors for magnetic and electric fields and temperature, operating even under ambient conditions. Potential applications of such sensors are for example nuclear magnetic resonance (NMR) spectroscopy of nanoscopic samples [1] or stearing and characterizing nuclear spin-based quantum simulators [2]. In a sense, NV centers are remote sensors, where the fluorescence response is the only channel to convey measurement results, which is classical information. Proximal 13C nuclear spins couple strongly to the NV center’s electron spin and constitute a quantum memory. Recently we have demonstrated the benefit of a single memory qubit for improving sensitivity of an NV center [3]. Here, we scale up the memory register and demonstrate the advantages of metrology information storage and processing for improved quantum sensing. For example, we apply the quantum Fourier transformation for high resolution NMR spectroscopy and obtain multi-bit measurement results.
[1] T. Staudacher, et al. Science 339, 561 (2013).
[2] J. Cai, et al. Nature Physics 9, 1683 (2013).
[3] S. Zaiser, et al. Nature Communications 7, 12279 (2016).