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Decoherence-assisted transport in pigment protein complexes
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Theoretical Chemistry. University of Barcelona. (Quantum Information Theory)
2014 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Two chlorophylls of the FMO complex, the light-harvesting complex of the green sulfur bacteria, are modeled as two coupled qubits, each surrounded by one spin-bath simulating the environment. The dynamics of the system at a non-zero temperature provide exact analytical expressions for the transition probability and the coherence. It is shown that the decoherence-inducing interaction with the environment enhances the electronic energy transfer. Also the correlations in terms of entanglement and nonlocality are quantitatively studied, sensitively differing when introducing a decay term to resemble both chlorophylls being in their ground states. It is proved that nonlocality is a stronger form of correlation than entanglement.

Place, publisher, year, edition, pages
2014. , 42 p.
Series
UPKEM C, 51
Keyword [en]
Entanglement, concurrence, nonlocality, electronic energy transfer, FMO complex, light-harvesting complex.
National Category
Theoretical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-228406OAI: oai:DiVA.org:uu-228406DiVA: diva2:733878
Subject / course
Chemistry
Educational program
Bachelor Programme in Chemistry
Presentation
2014-05-26, 09:00 (English)
Supervisors
Examiners
Available from: 2014-07-12 Created: 2014-07-11 Last updated: 2014-07-12Bibliographically approved

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