Nonadiabatic dynamics and geometric phase of an ultrafast rotating electron spin

Chen, Xing-Yan; Li, Tongcang und Yin, Zhang-Qi (2019): Nonadiabatic dynamics and geometric phase of an ultrafast rotating electron spin. In: Science Bulletin, Bd. 64, Nr. 6: S. 380-384

Abstract

The spin in a rotating frame has attracted a lot of attentions recently, as it deeply relates to both fundamental physics such as pseudo-magnetic field and geometric phase, and applications such as gyroscopic sensors. However, previous studies only focused on adiabatic limit, where the rotating frequency is much smaller than the spin frequency. Here we propose to use a levitated nano-diamond with a built-in nitrogen-vacancy (NV) center to study the dynamics and the geometric phase of a rotating electron spin without adiabatic approximation. We find that the transition between the spin levels appears when the rotating frequency is comparable to the spin frequency at zero magnetic field. Then we use Floquet theory to numerically solve the spin energy spectrum, study the spin dynamics and calculate the geometric phase under a finite magnetic field, where the rotating frequency to induce resonant transition could be greatly reduced. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2095-9273
• Sprache: Englisch