Rabi-vibronic resonance with large number of vibrational quanta

Glenn, Rachel; Raǐkh, M. É.

doi:10.1103/physrevb.84.195454

Cited by 5 publications

(4 citation statements)

References 30 publications

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“…There is a similarity between the relay-race mechanism considered above and the Rabi-vibronic resonance studied in Ref. 32. In the latter case,= the Rabi oscillations are resonantly coupled to a vibronic mode rather than to the neighboring spin.…”

Section: /2supporting

confidence: 57%

Interaction-induced long-time tail of a nonlinear ac absorption in a localized system: A relay-race mechanism

Malla

Raǐkh

2019

Phys. Rev. B

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In conventional solid-state electron systems with localized states the ac absorption is linear since the inelastic widths of the energy levels exceeds the drive amplitude. The situation is different in the systems of cold atoms in which phonons are absent. Then even a weak drive leads to saturation of the ac absorption within resonant pairs, so that the population of levels oscillates with the Rabi frequency. We demonstrate that, in the presence of weak dipole-dipole interactions, the response of the system acquires a long-time component which oscillates with frequency much smaller than the Rabi frequency. The underlying mechanism of this long-time behavior is that the fields created in the course of the Rabi oscillations serve as resonant drive for the second-generation Rabi oscillations in pairs with level spacings close to the Rabi frequency. The frequency of the second-generation oscillations is of the order of interaction strength. As these oscillations develop, they can initiate the next-generation Rabi oscillations, and so on. Formation of the second-generation oscillations is facilitated by the non-diagonal component of the dipole-dipole interaction tensor. PACS numbers:arXiv:1812.06218v1 [cond-mat.dis-nn]

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Section: /2supporting

confidence: 57%

Interaction-induced long-time tail of a nonlinear ac absorption in a localized system: A relay-race mechanism

Malla

Raǐkh

2019

Phys. Rev. B

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“…As a final remark, note that there is a conceptual similarity between the second-order Rabi oscillations, which develop at ω m = Ω R and Rabi-vibronic resonance 31 . In the latter case, the modulation of spacing between the Zeeman levels is accomplished via coupling of two-level system to a harmonic oscillator with frequency close to Ω R .…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance in slowly modulated longitudinal field: Modified shape of the Rabi oscillations

et al. 2013

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The sensitivity of the Rabi oscillations of a resonantly driven spin-1 2 system to a weak and slow modulation of the static longitudinal magnetic field, B0, is studied theoretically. We establish the mapping of a weakly driven two-level system with modulation onto a strongly driven system without modulation. The mapping suggests that different regimes of spin dynamics, known for a strongly driven system, can be realized under common experimental conditions of weak driving (driving field B1 B0) upon proper choice of the domains of modulation frequency, ωm, and amplitude, B2. Fast modulation ωm ΩR, where ΩR is the Rabi frequency, emulates the regime of driving frequency much bigger than the resonant frequency. Strong modulation, B2 B1, emulates the regime B1 B0. Resonant modulation, ωm ≈ ΩR, gives rise to an envelope of the Rabi oscillations. The shape of this envelope is highly sensitive to the detuning of the driving frequency from the resonance. Theoretical predictions for different domains of B2 and ωm were tested experimentally using NMR of protons in water, where, without modulation, the pattern of Rabi oscillations could be observed over many periods. We present experimental results which reproduce the three predicted modulation regimes, and agree with theory quantitatively.

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“…The experimental feasibility of reaching this instability region is discussed. Related effects of Sisyphus cooling, amplification, lasing and SEO have been theoretically predicted in other systems having a similar retarded response [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 69%

Instability in the Hartmann--Hahn double resonance

Levi,

Masis,

Buks

2020

Preprint

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The Hartmann-Hahn technique allows sensitivity enhancement of magnetic resonance imaging and spectroscopy by coupling the spins under study to another spin species that is externally driven.Here we theoretically study the coupled spins' dynamics, and find that for a certain region of driving parameters the system becomes unstable. The required conditions for making this region of instability becoming experimentally accessible are discussed.

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Rabi-vibronic resonance with large number of vibrational quanta

Cited by 5 publications

References 30 publications

Interaction-induced long-time tail of a nonlinear ac absorption in a localized system: A relay-race mechanism

Interaction-induced long-time tail of a nonlinear ac absorption in a localized system: A relay-race mechanism

Magnetic resonance in slowly modulated longitudinal field: Modified shape of the Rabi oscillations

Instability in the Hartmann--Hahn double resonance

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