Details

Autor(en) / Beteiligte

• Wood, A. A.
• Lilette, E.
• Fein, Y. Y.
• Perunicic, V. S.
• Hollenberg, L. C. L.
• Scholten, R. E.
• Martin, A. M.

Titel

Magnetic pseudo-fields in a rotating electron–nuclear spin system

Ist Teil von

• Nature physics, 2017-11, Vol.13 (11), p.1070-1073

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Physical rotation can create fictitious magnetic fields, a phenomenon that stems from Larmor's theorem. The effect on a nuclear spin ensemble was measured using the spin–echo of nitrogen–vacancy centres in rapidly spinning diamond. Interestingly, the rotationally induced magnetic fields can cancel a conventional magnetic field for the nuclear spins. Analogous to the precession of a Foucault pendulum observed on the rotating Earth, a precessing spin observed in a rotating frame of reference appears frequency-shifted. This can be understood as arising from a magnetic pseudo-field 1 , 2 in the rotating frame that nevertheless has physically significant consequences, such as the Barnett effect 3 . To detect these pseudo-fields, a rotating-frame sensor is required 4 . Here we use quantum sensors, nitrogen–vacancy (NV) centres, in a rapidly rotating diamond to detect pseudo-fields in the rotating frame. Whereas conventional magnetic fields induce precession at a rate proportional to the gyromagnetic ratio, rotation shifts the precession of all spins equally, and thus primarily affect 13 C nuclear spins in the sample. We are thus able to explore these effects via quantum sensing in a rapidly rotating frame, and define a new approach to quantum control using rotationally induced nuclear spin-selective magnetic fields. This work provides an integral step towards realizing precision rotation sensing and quantum spin gyroscopes.