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Quantum Coherent Energy Transfer over Varying Pathways in Single Light-Harvesting Complexes

Title data

Hildner, Richard ; Brinks, Daan ; Nieder, Jana B. ; Cogdell, Richard J. ; van Hulst, Niek F.:
Quantum Coherent Energy Transfer over Varying Pathways in Single Light-Harvesting Complexes.
In: Science. Vol. 340 (2013) Issue 6139 . - pp. 1448-1451.
ISSN 1095-9203
DOI: https://doi.org/10.1126/science.1235820

Abstract in another language

The initial steps of photosynthesis comprise the absorption of sunlight by pigment-protein antenna complexes followed by rapid and highly efficient funneling of excitation energy to a reaction center. In these transport processes, signatures of unexpectedly long-lived coherences have emerged in two-dimensional ensemble spectra of various light-harvesting complexes. Here, we demonstrate ultrafast quantum coherent energy transfer within individual antenna complexes of a purple bacterium under physiological conditions. We find that quantum coherences between electronically coupled energy eigenstates persist at least 400 femtoseconds and that distinct energy-transfer pathways that change with time can be identified in each complex. Our data suggest that long-lived quantum coherence renders energy transfer in photosynthetic systems robust in the presence of disorder, which is a prerequisite for efficient light harvesting.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik IX - Spektroskopie weicher Materie
Profile Fields > Advanced Fields > Polymer and Colloid Science
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Graduate Schools > Bayreuth Graduate School of Mathematical and Natural Sciences (BayNAT) > Photophysics of Synthetic and Biological Multichromophoric Systems
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Graduate Schools
Graduate Schools > Bayreuth Graduate School of Mathematical and Natural Sciences (BayNAT)
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 20 Apr 2015 06:38
Last Modified: 01 Mar 2017 10:36
URI: https://eref.uni-bayreuth.de/id/eprint/10528