DMA - Arnaud Lazarus : " Exploiting periodicity in the dynamic stability of systems with time-varying Properties"

In the context of the GdR EX-MODELI, a seminar will be given on Thursday March 14 between 3 and 4 pm by Arnaud Lazarus, MCF at Sorbonne Université, Institut Jean Le Rond d'Alembert and currently visiting Harvard University.

He will present a seminar on the theme: Exploiting periodicity in the dynamic stability of systems with time-varying Properties.

Abstract : Dynamic stability is the ability of a system’s configurational state to overcome a disturbance over time. A common way to passively control this dynamical feature is to periodically modulate the properties of the system in time. This is what is done to trigger the swings of the Butafumeiro at the Santiago de Compostela Cathedral, to dynamically stabilize charged particles in mass spectrometers or to sustain exotic quantum states in Floquet engineering. In this presentation, we show that new dynamical phenomena emerge when the periodic variations of the system’s properties are large and occur on similar time scales than the natural ones. In this regime, it become for example straightforward to break the record of super-harmonic orders observed in the parametric resonances of an oscillator or to optimally trap a magnetic dipole on its unstable equilibrium. All the shown examples are rationalized through a fundamental 1 degree-of-freedom model and some desktop-scale experiments but the dynamical concepts being universal, it should offer new functionalities across scales and engineering domains.

This seminar will be held online (Teams).

https://teams.microsoft.com/l/meetup-join/19%3aTdrb2phnjj_MsCmmXW8KlQNpY...