Vibrational resonance of ammonia molecule with doubly singular position-dependent mass

Roy-Layinde, T.O. and Omoteso, K.A. and Oyero, B.A. and Laoye, J.A. and Vincent, U.E. (2022) Vibrational resonance of ammonia molecule with doubly singular position-dependent mass. European Physical Journal B, 95 (5): 80. ISSN 1434-6028

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Abstract

Abstract: We examine vibrational resonance (VR) in a position-dependent mass (PDM) oscillator with doubly singular mass distribution function describing the vibrational inversion mode of NH3 molecule. The impacts of the PDM parameters (m, a, η) on VR were studied by computing the response amplitudes as functions of the amplitude of high-frequency component of the dual-frequency driving forces and the PDM parameters. We show for the first time that, beside the significant roles played by the parameters of the variable mass in inducing and controlling resonances similar to the forcing parameters, the variable mass parameters impact on the resonance characteristics by leading the system from single resonance into double resonance.