Nonlinear Switching Dynamics in a Nanomechanical Resonator - Condensed Matter > Mesoscale and Nanoscale PhysicsReportar como inadecuado




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Abstract: The oscillatory response of nonlinear systems exhibits characteristicphenomena such as multistability, discontinuous jumps and hysteresis. These canbe utilized in applications leading, e.g., to precise frequency measurement,mixing, memory elements, reduced noise characteristics in an oscillator orsignal amplification. Approaching the quantum regime, concepts have beenproposed that enable low backaction measurement techniques or facilitate thevisualisation of quantum mechanical effects. Here we study the dynamic responseof nanoelectromechanical resonators in the nonlinear regime aiming at a moredetailed understanding and an exploitation for switching applications. Whereasmost previous investigations concentrated on dynamic phenomena arising at theonset of bistability, we present experiments that yield insight into thenon-adiabatic evolution of the system while subjected to strong driving pulsesand the subsequent relaxation. Modeling the behaviour quantitatively with aDuffing oscillator, we can control switching between its two stable states athigh speeds, exceeding recently demonstrated results by 10,000.



Autor: Quirin P. Unterreithmeier, Thomas Faust, Jorg P. Kotthaus

Fuente: https://arxiv.org/



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