Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 27: Quantum Optics III

Q 27.6: Talk

Wednesday, March 11, 2020, 12:15–12:30, f342

Demonstration of Coherent Multitone Microwave Sequences for Simultaneous Control of all Electronic Ground States of the Nitrogen-Vacancy Center in Diamond — •Florian Böhm, Niko Nikolay, Sascha Neinert, Bernd Sontheimer, and Oliver Benson — Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, Germany

The nitrogen-vacancy (NV) center in diamond is the most prominent defect in diamond due to its outstanding properties as a quantum light source and its manipulable electron spin which can easily be read-out optically. NV applications range from quantum information processing to high sensitivity nano-magnetometry [1].

In our work we explore the possibility of applying multitone microwave pulses, allowing a full simultaneous control of all three electronic ground states of the NV center. This here presented spin manipulation scheme opens up new measurement possibilities. For example spin echo techniques operating on a superposition state including all three ground states could be used to increase the NV center's magnetic field sensitivity.

After investigating the spin-forbidden coherent population swapping between the ms = -1 and ms = +1 states, without undergoing the spin allowed transition into the ms = 0 state via microwave Raman transitions we also assess if more complex multitone pulse sequences could be suitable for an enhanced magnetic field sensing.

[1] Awschalom, D. D., et al., Nat. Photonics 12.9 (2018): 516-527.