{"title":"Electronic Excitation Transfer Dynamics in a 3-Site System Using an Incoherent Born-Markov Rate Model.","authors":"Amit Kumar Upadhyay, Karthik Sasihithlu","doi":"10.1002/cphc.202500029","DOIUrl":null,"url":null,"abstract":"<p><p>The role of coherence in electronic excitation transfer (EET) dynamics in multi-site systems is typically investigated by comparing results from exact quantum dynamical methods with those derived from incoherent approaches such as the Fermi's Golden Rule (FGR) model. Recent studies on three-site systems have highlighted a remarkable dependence of EET dynamics on intersite coupling for specific configurations. To explore the influence of coherence in such behavior, we adapt the secular Redfield theory to develop an incoherent model by systematically excluding terms that couple populations and coherences in the site basis. The dynamics predicted by this model are then compared with those obtained from the coherent Lindbladian master equation and the incoherent FGR models. This framework provides a general approach for evaluating the role of coherence in a wide range of open quantum systems operating within the weak system-bath coupling regime.</p>","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":" ","pages":"e2500029"},"PeriodicalIF":2.3000,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemphyschem","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/cphc.202500029","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The role of coherence in electronic excitation transfer (EET) dynamics in multi-site systems is typically investigated by comparing results from exact quantum dynamical methods with those derived from incoherent approaches such as the Fermi's Golden Rule (FGR) model. Recent studies on three-site systems have highlighted a remarkable dependence of EET dynamics on intersite coupling for specific configurations. To explore the influence of coherence in such behavior, we adapt the secular Redfield theory to develop an incoherent model by systematically excluding terms that couple populations and coherences in the site basis. The dynamics predicted by this model are then compared with those obtained from the coherent Lindbladian master equation and the incoherent FGR models. This framework provides a general approach for evaluating the role of coherence in a wide range of open quantum systems operating within the weak system-bath coupling regime.
期刊介绍：
ChemPhysChem is one of the leading chemistry/physics interdisciplinary journals (ISI Impact Factor 2018: 3.077) for physical chemistry and chemical physics. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies.
ChemPhysChem is an international source for important primary and critical secondary information across the whole field of physical chemistry and chemical physics. It integrates this wide and flourishing field ranging from Solid State and Soft-Matter Research, Electro- and Photochemistry, Femtochemistry and Nanotechnology, Complex Systems, Single-Molecule Research, Clusters and Colloids, Catalysis and Surface Science, Biophysics and Physical Biochemistry, Atmospheric and Environmental Chemistry, and many more topics. ChemPhysChem is peer-reviewed.
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