Coherence in energy transfer and photosynthesis

Aurélia Chenu, Gregory D. Scholes

Research output: Contribution to journalArticle

208 Scopus citations

Abstract

Ultrafast energy transfer is used to transmit electronic excitation among the many molecules in photosynthetic antenna complexes. Recent experiments and theories have highlighted the role of coherent transfer in femtosecond studies of these proteins, suggesting the need for accurate dynamical models to capture the subtle characteristics of energy transfer mechanisms. Here we discuss how to think about coherence in light harvesting and electronic energy transfer. We review the various fundamental concepts of coherence, spanning from classical phenomena to the quantum superposition, and define coherence in electronic energy transfer. We describe the current status of experimental studies on light-harvesting complexes. Insights into the microscopic process are presented to highlight how and why this is a challenging problem to elucidate. We present an overview of the applicable dynamical theories to model energy transfer in the intermediate coupling regime.

Original languageEnglish (US)
Pages (from-to)69-96
Number of pages28
JournalAnnual Review of Physical Chemistry
Volume66
DOIs
StatePublished - Apr 1 2015

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Keywords

  • exciton
  • intermediate coupling regime
  • light harvesting
  • nonequilibrium processes
  • process coherence
  • quantum biology
  • two-dimensional electronic spectroscopy

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