Fluctuation-induced nonlinear dynamics of nanomechanical systems (C01)

• Subject Area: Experimental Condensed Matter Physics
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 425217212

High Q nanomechanical string resonators are employed as a well-controlled platform to explore the fluctuation-induced nonlinear dynamics in driven systems. In particular, we will focus on the effects of a strong resonant drive. In the nonlinear response regime, this leads to the squeezing of thermomechanical fluctuations. For even stronger driving, the observed resonantly induced negative friction and the resulting dynamical instability will also be addressed. Finally, we will include systems under non-harmonic driving and engineered fluctuations. The project will thus enable fundamental insights into the classical nonlinear dynamics of driven systems.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1432: Fluctuations and Nonlinearities in Classical and Quantum Matter beyond Equilibrium
• Major Instrumentation: Arbitrary waveform generator with integrated lock-in amplifier
• Instrumentation Group: 6040 Frequenz-Umformer (statisch) und Hochfrequenzgeneratoren
• Applicant Institution: Universität Konstanz
• Project Head: Professorin Dr. Eva M. Weig