Polariton mediated resonance energy transfer in a fluid
| Autor: | Dale Green, Garth A. Jones, Akbar Salam |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Photon 010304 chemical physics Isotropy General Physics and Astronomy Rate equation 010402 general chemistry 01 natural sciences 0104 chemical sciences symbols.namesake Quantum mechanics 0103 physical sciences Polariton symbols Fermi's golden rule Feynman diagram Physical and Theoretical Chemistry Quantum Coherence (physics) |
| Zdroj: | The Journal of Chemical Physics. 153:034111 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/5.0011562 |
| Popis: | The focus of this work is on a microscopic quantum electrodynamical understanding of cumulative quantum effects in resonance energy transfer occurring in an isotropic and disordered medium. In particular, we consider quantum coherence, defined in terms of interferences between Feynman pathways, and analyze pure-amplitude and phase cross terms that appear in the Fermi golden rule rate equation that results from squaring the matrix element for mediated energy transfer. It is shown that pure-amplitude terms dominate in the near-zone when chromophores are close in proximity to one another (within a few nanometers), and phase cross terms dominate toward the far-zone when phase differences between different Feynman pathways begin to emerge. This can be understood in terms of physical attributes of the mediating photon, whose character becomes more real at long distances, coinciding with vanishing longitudinal components of the field, as transverse components begin to dominate. |
| Databáze: | OpenAIRE |
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