Multiphoton Transitions in a Spin System Driven by Strong Bichromatic Field

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dc.creatorSaiko, A. P.
dc.creatorFedoruk, G. G.
dc.creatorMarkevich, S. A.
dc.date2007-12-12
dc.date.accessioned2026-07-07T08:48:49Z
dc.date.available2026-07-07T08:48:49Z
dc.descriptionEPR transient nutation spectroscopy is used to measure the effective field (Rabi frequency) for multiphoton transitions in a two-level spin system bichromatically driven by a transverse microwave (MW) field and a longitudinal radio-frequency (RF) field. The behavior of the effective field amplitude is examined in the case of a relatively strong MW field, when the derivation of the effective Hamiltonian cannot be reduced to first-order perturbation theory in w_{1} / w_{rf} (w_{1} is the microwave Rabi frequency, w_{rf} is the RF frequency). Experimental results are consistently interpreted by taking into account the contributions of second and third order in w_{1} / w_{rf} evaluated by Krylov-Bogolyubov-Mitropolsky averaging. In the case of inhomogeneously broadened EPR line, the third-order correction modifies the nutation frequency, while the second-order correction gives rise to a change in the nutation amplitude due to a Bloch-Siegert shift.
dc.description7 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0712.1898
dc.identifierhttp://arxiv.org/abs/0712.1898
dc.identifierJETP, Vol. 105, No. 5, pp. 893-899 (2007) [Zh. Eksp. Teor. Fiz., Vol. 132, No. 5, pp. 1026-1033 (2007)]
dc.identifierdoi:10.1134/S1063776107110039
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/144079
dc.subjectMaterials Science
dc.titleMultiphoton Transitions in a Spin System Driven by Strong Bichromatic Field
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