Multiphoton Raman transitions and Rabi oscillations in driven spin systems

At a Glance

Metadata	Details
Publication Date	2018-10-05
Journal	Physical review. A/Physical review, A
Authors	A. P. Saǐko, С. А. Маркевич, R. Fedaruk
Institutions	National Academy of Sciences of Belarus
Citations	21

Abstract

In the framework of the non-secular perturbation theory based on the\nBogoliubov averaging method, the coherent dynamics of multiphoton Raman\ntransitions in a two-level spin system driven by an amplitude-modulated\nmicrowave field is studied. Closed-form expressions for the Rabi frequencies of\nthese transitions have been obtained beyond the rotating wave approximation for\nthe low-frequency driving component. It is shown that spin states dressed by\nthe high-frequency component of the driving field are shifted due to the\nBloch-Siegert-like effect caused by antiresonant interactions with the strong\nlow-frequency driving. We predict that with increasing the order of the Raman\ntransition the Rabi frequency decreases and the contribution of the\nBloch-Siegert shift to this frequency becomes dominant. It is found that the\namplitude and phase of the Rabi oscillations strongly depend on the initial\nphase of the low-frequency field as well as on detuning from multiphoton\nresonance. The recent experimental data for the second- and third-order Raman\ntransitions observed for nitrogen-vacancy center in diamond [Z. Shu, et al.,\narXiv:1804. 10492] are well described in the frame of our approach. Our results\nprovide new possibilities for coherent control of quantum systems.\n

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Original Source

DOI: https://doi.org/10.1103/physreva.98.043814

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