Multiphoton Raman transitions and Rabi oscillations in driven spin systems
Abstract
In the framework of the non-secular perturbation theory based on the Bogoliubov averaging method, the coherent dynamics of multiphoton Raman transitions in a two-level spin system driven by an amplitude-modulated microwave field is studied. Closed-form expressions for the Rabi frequencies of these transitions have been obtained beyond the rotating wave approximation for the low-frequency driving component. It is shown that spin states dressed by the high-frequency component of the driving field are shifted due to the Bloch-Siegert-like effect caused by antiresonant interactions with the strong low-frequency driving. We predict that with increasing the order of the Raman transition the Rabi frequency decreases and the contribution of the Bloch-Siegert shift to this frequency becomes dominant. It is found that the amplitude and phase of the Rabi oscillations strongly depend on the initial phase of the low-frequency field as well as on detuning from multiphoton resonance. The recent experimental data for the second- and third-order Raman transitions observed for nitrogen-vacancy center in diamond [Z. Shu, et al., arXiv:1804. 10492] are well described in the frame of our approach. Our results provide new possibilities for coherent control of quantum systems.
Cite
@article{arxiv.1807.05086,
title = {Multiphoton Raman transitions and Rabi oscillations in driven spin systems},
author = {A. P. Saiko and S. A. Markevich and R. Fedaruk},
journal= {arXiv preprint arXiv:1807.05086},
year = {2018}
}
Comments
9 pages, 7 figures, Accepted to Phys. Rev. A (18 Sep 2018)