Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 6: Precision Measurements and Metrology II (with Q)

A 6.4: Vortrag

Montag, 23. März 2015, 15:30–15:45, P/H1

Highly sensitive magnetic fields sensing with the nitrogen vacancy center in diamond by using the rotary echo scheme — •Alexander Stark1,3, Xi Kong1, Vagharsh Mkhitaryan2, Viatcheslav Dobrovitski2, Ulrik L. Andersen3, and Fedor Jelezko11Institut für Quantenoptik, Universität Ulm, 89081 Ulm, Germany — 2Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA — 3Department of Physics, Technical University of Denmark, Fysikvej, 2800 Kgs. Lyngby, Denmark

Single defect centres in diamond and especially the nitrogen-vacancy (NV) show remarkable physical properties making them ideal candidates for single photon sources, qubits and nano-scale magnetic field sensors [1]. In a continuous decoupling protocol [2] the electron spin of the NV center is subjected to continuous Rabi driving with a periodically alternating phase forming the Rotary Echo (RE) scheme [3]. We show that this technique improves greatly the resolution for magnetic field sensing (by a factor of 10) compared to conventional dynamical decoupling techniques [4]. We believe, that RE is one of the promising candidates for the detection of individual nuclear spins in the emerging field of diamond magnetometry.

[1] M. Doherty et al., Physics Reports 528, 1 (2013)

[2] M. Hirose et al., Physical Review A 86, 062320 (2012).

[3] V.V. Mkhitaryan et al., arXiv:1403.6446 (2014).

[4] C. D. Aiello et al., Nature Communications 4, 1419 (2013).

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