Ultrafast Quantum Effects and Vibrational Dynamics in Organic and Biological Systems

This thesis focuses on theoretical analysis of the sophisticated ultrafast optical experiments that probe the crucial first few picoseconds of quantum light harvesting, making an important contribution to quantum biology, an exciting new field at the intersection of condensed matter, physical chemistry and biology. It provides new insights into the role of vibrational dynamics during singlet fission of organic pentacene thin films, and targeting the importance of vibrational dynamics in the design of nanoscale organic light harvesting devices, it also develops a new wavelet analysis technique to probe vibronic dynamics in time-resolved nonlinear optical experiments. Lastly, the thesis explores the theory of how non-linear breather vibrations are excited and propagate in the disordered nanostructures of photosynthetic proteins.

Nominated as an outstanding PhD thesis by the University of Cambridge, UK Provides new insights into the role of vibrational dynamics during singlet fission of thin films of pentacene Describes a comprehensive approach to analyzing nonlinear 2D spectroscopy experiments, enabling additional information to be extracted from 2D spectra Crosses the divide between organic and biological light-harvesting systems, identifying key similarities between the two Includes supplementary material: sn.pub/extras

Auteur
Dr Sarah Morgan is a theoretical physicist interested in applying methods from physics to biological systems. After a Master's degree at the University of Exeter, she completed a PhD in the Theory of Condensed Matter group, Department of Physics, Cambridge University. Dr Morgan is now a postdoctoral research associate in Cambridge working on graph theoretical analysis of neuroimaging data.

Contenu
Introduction.- Methods.- 2D Spectroscopy of Pentacene Thin Films.- Time-frequency Analysis for 2D Spectroscopy of PSII.- Nonlinear Network Model of Energy Transfer and Localisation in FMO.- Conclusions.