The coherence time of sunlight in the context of natural and artificial light-harvesting
Abstract The suggestion that quantum coherence might enhance biological processes such as photosynthesis is not only of fundamental importance but also leads to hopes of developing bio-inspired ‘green’ quantum technologies that mimic nature. A key question is how the timescale of coherent processes...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-08693-0 |
| _version_ | 1819052063974227968 |
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| author | Berke Vow Ricketti Erik M. Gauger Alessandro Fedrizzi |
| author_facet | Berke Vow Ricketti Erik M. Gauger Alessandro Fedrizzi |
| author_sort | Berke Vow Ricketti |
| collection | DOAJ |
| description | Abstract The suggestion that quantum coherence might enhance biological processes such as photosynthesis is not only of fundamental importance but also leads to hopes of developing bio-inspired ‘green’ quantum technologies that mimic nature. A key question is how the timescale of coherent processes in molecular systems compare to that of the driving light source—the Sun. Across the quantum biology literature on light-harvesting, the coherence time quoted for sunlight spans about two orders of magnitude, ranging from 0.6 to ‘10s’ of femtoseconds. This difference can potentially be significant in deciding whether the induced light-matter coherence is long enough to affect dynamical processes following photoexcitation. Here we revisit the historic calculations of sunlight coherence starting with the black-body spectrum and then proceed to provide values for the more realistic case of atmospherically filtered light. We corroborate these values with interferometric measurements of the complex degree of temporal coherence from which we calculate the coherence time of atmospherically filtered sunlight as $$1.12\pm {0.04}\,{\hbox { fs}}$$ 1.12 ± 0.04 fs , as well as the coherence time in a chlorophyll analogous filtered case as $$4.87\pm {0.21}\,{\hbox { fs}}$$ 4.87 ± 0.21 fs . |
| first_indexed | 2024-12-21T12:13:53Z |
| format | Article |
| id | doaj.art-1ae6f22b98ec4c549bcff5925f9af181 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-21T12:13:53Z |
| publishDate | 2022-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-1ae6f22b98ec4c549bcff5925f9af1812022-12-21T19:04:30ZengNature PortfolioScientific Reports2045-23222022-03-011211910.1038/s41598-022-08693-0The coherence time of sunlight in the context of natural and artificial light-harvestingBerke Vow Ricketti0Erik M. Gauger1Alessandro Fedrizzi2Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt UniversityInstitute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt UniversityInstitute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt UniversityAbstract The suggestion that quantum coherence might enhance biological processes such as photosynthesis is not only of fundamental importance but also leads to hopes of developing bio-inspired ‘green’ quantum technologies that mimic nature. A key question is how the timescale of coherent processes in molecular systems compare to that of the driving light source—the Sun. Across the quantum biology literature on light-harvesting, the coherence time quoted for sunlight spans about two orders of magnitude, ranging from 0.6 to ‘10s’ of femtoseconds. This difference can potentially be significant in deciding whether the induced light-matter coherence is long enough to affect dynamical processes following photoexcitation. Here we revisit the historic calculations of sunlight coherence starting with the black-body spectrum and then proceed to provide values for the more realistic case of atmospherically filtered light. We corroborate these values with interferometric measurements of the complex degree of temporal coherence from which we calculate the coherence time of atmospherically filtered sunlight as $$1.12\pm {0.04}\,{\hbox { fs}}$$ 1.12 ± 0.04 fs , as well as the coherence time in a chlorophyll analogous filtered case as $$4.87\pm {0.21}\,{\hbox { fs}}$$ 4.87 ± 0.21 fs .https://doi.org/10.1038/s41598-022-08693-0 |
| spellingShingle | Berke Vow Ricketti Erik M. Gauger Alessandro Fedrizzi The coherence time of sunlight in the context of natural and artificial light-harvesting Scientific Reports |
| title | The coherence time of sunlight in the context of natural and artificial light-harvesting |
| title_full | The coherence time of sunlight in the context of natural and artificial light-harvesting |
| title_fullStr | The coherence time of sunlight in the context of natural and artificial light-harvesting |
| title_full_unstemmed | The coherence time of sunlight in the context of natural and artificial light-harvesting |
| title_short | The coherence time of sunlight in the context of natural and artificial light-harvesting |
| title_sort | coherence time of sunlight in the context of natural and artificial light harvesting |
| url | https://doi.org/10.1038/s41598-022-08693-0 |
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