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Relation between Dephasing Time and Energy Gap Fluctuations in Biomolecular Systems

Mallus, Maria Ilaria; Aghtar, Mortaza; Chandrasekaran, Suryanarayanan; Luedemann, Gesa; Elstner, Marcus; Kleinekathoefer, Ulrich



Abstract (englisch): Excitation energy and charge transfer are fundamental processes in biological systems. Because of their quantum nature, the effect of dephasing on these processes is of interest especially when trying to understand their efficiency. Moreover, recent experiments have shown quantum coherences in such systems. As a first step toward a better understanding, we studied the relationship between dephasing time and energy gap fluctuations of the individual molecular subunits. A larger set of molecular simulations has been investigated to shed light on this dependence. This set includes bacterio-chlorophylls in Fenna–Matthews–Olson complexes, the PE545 aggregate, the LH2 complexes, DNA, photolyase, and cryptochromes. For the individual molecular subunits of these aggregates it has been confirmed quantitatively that an inverse proportionality exists between dephasing time and average gap energy fluctuation. However, for entire complexes including the respective intermolecular couplings, such a relation still needs to be verified.


Zugehörige Institution(en) am KIT Institut für Physikalische Chemie (IPC)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1021/acs.jpclett.6b00134
ISSN: 1948-7185
URN: urn:nbn:de:swb:90-566289
KITopen ID: 1000056628
Erschienen in The journal of physical chemistry letters
Band 7
Heft 7
Seiten 1102-1108
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