In Vivo Probing of Quantum Coherence in Bacterial Photosynthesis
Abstract
The research proposed here will employ the first spatially-resolved multidimensional spectroscopy to enable the elucidation of quantum effects in biological systems. Using purple sulfur photosynthetic bacteria as a model system, we aim to understand the physical origin of recently observed quantum coherence in photosynthetic antennae complexes and to determine its importance for efficient energy transfer. Fluorescencebased multidimensional spectroscopies enable extensive characterization of coherent dynamics in isolated photosynthetic complexes and in vivo in purple bacterial cells. The proposed measurements will distinguish between vibrational, electronic and vibronic coherence, uncovering key design principles that enable efficient photosynthetic energy transfer. The in vivo studies will expose the spatial extent to which quantum coherence persists in larger networks of coupled photosynthetic complexes. The proposed measurements will challenge theoretical and computational approaches to capture the observed quantum and non-equilibrium phenomena. With an understanding of the key design elements of biological systems that exploit quantum effects to optimize their function, it may be possible to mimic such design principles in artificial materials for energy capture, conversion and human use. The proposed research supports technological advances in application areas of interest to the United States Air Force, including biomolecular and atomic imaging below the diffraction limit, biologically inspired new innovative and novel materials, human performance and enhanced computational development for future Air force needs.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 09, 2018
- Source ID
- FA95501810124
Entities
People
- Jennifer P Ogilvie
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Michigan