ITP work published in Nature Communications

Theoretical predictions by Jaemin, Felipe, Susana and Martin to explain long-lasting quantum coherence in photosynthetic systems have been tested in an experiment using an artificial light harvester. These results were published in Nature Communications on 9 July 2015 and provide the first unambiguous demonstration of the relevance of vibronic effects for the persistence of coherent response in molecular aggregates.

Together with colleagues from Vienna University of Technology (Austria), Lund University (Sweden), Charles University in Prague (Czech Republic), Universidad Politécnica de Cartagena (Spain) and Freie Universität Berlin (Germany) they investigated an artificial molecular light-harvester, a J-aggregate of cyanine dyes. The relatively simple electronic and vibrational structure of the artificial light-harvester reduced the complexity of two-dimensional electronic spectra significantly and allowed to test different theoretical models quantitatively, showing that the coherent interaction between intramolecular vibrations and electronic degrees of freedom induces long-lasting quantum coherences, which provided quantitative agreement with their experimental observations.

LimWebEntry

You can read all details in J. Lim, D. Paleček, F. Caycedo-Soler, C. N. Lincoln, J. Prior, H. von Berlepsch, S. F. Huelga, M. B. Plenio, D. Zigmantas, and J. Hauer, Vibronic origin of long-lived coherence in an artificial molecular light harvester, Nature Communications 6, 7755 (2015).