Possibility of Direct Observation of the Bloch—Siegert Shift in Coherent Dynamics of Multiphoton Raman Transitions
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2019-10-01 |
| Journal | Journal of Experimental and Theoretical Physics Letters |
| Authors | A. P. Saiko, S.A. MARKEVICH, R. Fedaruk, A. P. Saiko, S.A. MARKEVICH |
| Institutions | University of Szczecin, National Academy of Sciences of Belarus |
| Citations | 3 |
Abstract
Section titled “Abstract”We study Rabi oscillations of the second-order Raman transition realized on\ndressed states of a qubit excited by an amplitude-modulated microwave field.\nThe co-rotating component of the ultrastrong low-frequency modulation field\nexcites virtual multiple photon processes between the dressed states and forms\nthe Rabi frequency in the so-called rotating wave approximation (RWA). The\ncounter-rotating modulation component also gives a significant contribution to\nthe Rabi frequency owing to the Bloch—Siegert effect. It is shown that for\nproperly chosen parameters of the modulation field and qubit, the Rabi\noscillations in the RWA vanish due to destructive interference of multiple\nphoton processes. In this case the Rabi oscillation results exclusively from\nthe Bloch—Siegert effect and is directly observed in the time-resolved\ncoherent dynamics as the Bloch—Siegert oscillation. Correspondingly, in\nFourier spectra of the coherent response, triplets are transformed into\ndoublets with the splitting between the lines equal to twice the Bloch—Siegert\nshift. We demonstrate these features by calculations of the qubit’s evolution\nin the conditions of experiments with a NV center in diamond, where Raman\ntransitions were observed. The direct observation of the Bloch—Siegert\noscillation offers new possibilities for studying driven quantum systems in the\nultastrong regime.\n
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
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