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Relation between Dephasing Time and Energy Gap Fluctuations in Biomolecular Systems

Mallus, Maria Ilaria; Aghtar, Mortaza; Chandrasekaran, Suryanarayanan; Luedemann, Gesa 1; Elstner, Marcus 1; Kleinekathoefer, Ulrich
1 Institut für Physikalische Chemie (IPC), Karlsruher Institut für Technologie (KIT)

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.


Volltext §
DOI: 10.5445/IR/1000056628
Originalveröffentlichung
DOI: 10.1021/acs.jpclett.6b00134
Scopus
Zitationen: 10
Web of Science
Zitationen: 11
Dimensions
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Physikalische Chemie (IPC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1948-7185
urn:nbn:de:swb:90-566289
KITopen-ID: 1000056628
Erschienen in The journal of physical chemistry letters
Verlag American Chemical Society (ACS)
Band 7
Heft 7
Seiten 1102-1108
Nachgewiesen in Dimensions
Scopus
Web of Science
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