About: Origin of Long-Lived Coherences in Light-Harvesting Complexes

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1021/jp304649c
Description	A vibronic exciton model is applied to explain the long-lived oscillatory features in the two-dimensional (2D) electronic spectra of the Fenna-Matthews-Olson (FMO) complex. Using experimentally determined parameters and uncorrelated site energy fluctuations, the model predicts oscillations with dephasing times of 1.3 ps at 77 K, which is in a good agreement with the experimental results. These long-lived oscillations originate from the coherent superposition of vibronic exciton states with dominant contributions from vibrational excitations on the same pigment. The oscillations obtain a large amplitude due to excitonic intensity borrowing, which gives transitions with strong vibronic character a significant intensity despite the small Huang-Rhys factor. Purely electronic coherences are found to decay on a 200 fs time scale. A vibronic exciton model is applied to explain the long-lived oscillatory features in the two-dimensional (2D) electronic spectra of the Fenna-Matthews-Olson (FMO) complex. Using experimentally determined parameters and uncorrelated site energy fluctuations, the model predicts oscillations with dephasing times of 1.3 ps at 77 K, which is in a good agreement with the experimental results. These long-lived oscillations originate from the coherent superposition of vibronic exciton states with dominant contributions from vibrational excitations on the same pigment. The oscillations obtain a large amplitude due to excitonic intensity borrowing, which gives transitions with strong vibronic character a significant intensity despite the small Huang-Rhys factor. Purely electronic coherences are found to decay on a 200 fs time scale. (en)
Title	Origin of Long-Lived Coherences in Light-Harvesting Complexes Origin of Long-Lived Coherences in Light-Harvesting Complexes (en)
skos:prefLabel	Origin of Long-Lived Coherences in Light-Harvesting Complexes Origin of Long-Lived Coherences in Light-Harvesting Complexes (en)
skos:notation	RIV/00216208:11320/12:10127458!RIV13-GA0-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GAP205/10/0989), P(MEB061107)
http://linked.open...iv/cisloPeriodika	25
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Mančal, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	157122
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/12:10127458
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	absorption; difference; bacteriochlorophyll; dynamics; temperature; energy-transfer; quantum coherence; antenna complexes; green sulfur bacteria; matthews-olson complex (en)
http://linked.open.../riv/klicoveSlovo	difference absorption temperature dynamics antenna complexes energy-transfer green sulfur bacteria matthews-olson complex quantum coherence bacteriochlorophyll
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[D0DACB857AE9]
http://linked.open...i/riv/nazevZdroje	Journal of Physical Chemistry B
http://linked.open...in/vavai/riv/obor	BE
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Molecular Complexes as Open Quantum Systems: Delocalization, Decoherence, Dissipation, Photo-induced dynamics and Ultrafast Spectroscopy Multidimensional spectroscopy of electron and vibrational coherences in pigment complexes
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	116
http://linked.open...iv/tvurceVysledku	Mančal, Tomáš Christensson, Niklas Kauffmann, Harald F. Pullerits, Tonu
http://linked.open...ain/vavai/riv/wos	000305769700007
issn	1520-6106
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1021/jp304649c
http://localhost/t...ganizacniJednotka	11320
is http://linked.open...avai/riv/vysledek of	Origin of Long-Lived Coherences in Light-Harvesting Complexes

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