Quantum dynamics of periodically driven nonlinear systems: dynamical multistability, unconventional driving, and macroscopic quantum tunneling
| Autor: | Gosner, Jennifer |
|---|---|
| Přispěvatelé: | Ankerhold, Joachim, Kubanek, Alexander |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Supraleitung
Josephson junctions DDC 530 / Physics Quantenphysik Quantentheorie Verzweigung (Mathematik) Periodic driving Josephson-Kontakt Symmetry breaking Tunneleffekt Parametric driving Multistabilit��t Multistabilität Down conversion Josephson junction Nonlinear systems Duffing oscillator DDC 510 / Mathematics Bifurcation theory Broken symmetry (Physics) ddc:530 Bifurcation Quantum tunneling ddc:510 Nichtlineares System |
| DOI: | 10.18725/oparu-38567 |
| Popis: | This thesis addresses three aspects of the quantum dynamics of periodically driven nonlinear systems. Going beyond the conventionally used Duffing approximation for a nonlinear system, dynamical multistabilities can be revealed which is described in the first part of this thesis. Fascinating new phenomena appear for a higher periodic driving of a nonlinear system at higher multiples of the eigenfrequency in comparison to the often used linear and parametric driving case. The second part of this thesis focuses in particular on a driving with three times the eigenfrequency which can lead to down converted period tripling subharmonic oscilations in the response of the system. The last part of this thesis describes a theoretical approach to interprete the quantum-mechanical nature in macroscopic quantum tunneling experiments of nonlinear systems. The results of this thesis may be tested in experiments including Josephson tunnel junctions but the very same nonlinear physics applies also to other fields of physics. |
| Databáze: | OpenAIRE |
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