Coherence turned on by incoherent light
| Autor: | Frank Schlawin, Vyacheslav N. Shatokhin, Mattia Walschaers, Andreas Buchleitner |
|---|---|
| Přispěvatelé: | University of Freiburg [Freiburg], Laboratoire Kastler Brossel (LKB (Jussieu)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), University of Oxford [Oxford] |
| Rok vydání: | 2018 |
| Předmět: |
molecular aggregate
Photon Exciton thermal photons Population General Physics and Astronomy FOS: Physical sciences 02 engineering and technology 01 natural sciences dipole-dipole interaction [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] Quantum mechanics 0103 physical sciences Molecule 010306 general physics education Quantum Physics education.field_of_study Quantum Physics energy transfer [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Intermolecular force 021001 nanoscience & nanotechnology coherence 13. Climate action 0210 nano-technology Quantum Physics (quant-ph) Ultrashort pulse Coherence (physics) |
| Zdroj: | New Journal of Physics New Journal of Physics, Institute of Physics: Open Access Journals, 2018, 20 (11), pp.113040. ⟨10.1088/1367-2630/aaf08f⟩ |
| ISSN: | 1367-2630 |
| DOI: | 10.1088/1367-2630/aaf08f |
| Popis: | One of the most pertinent problems in the debate on non-trivial quantum effects in biology concerns natural photosynthesis. Since sunlight is composed of thermal photons, it was argued to be unable to induce quantum coherence in matter, and that quantum mechanics is therefore irrelevant for the dynamical processes following photoabsorption. Our present analysis of a toy ``molecular aggregate" -- composed of two dipole-dipole interacting two-level atoms treated as an open quantum system -- however shows that incoherent excitations indeed can trigger coherent dynamics that persist: We demonstrate that collective decay processes induced by the dipole-dipole interaction create coherent intermolecular transport -- regardless of the coherence properties of the incoming radiation. Our analysis shows that the steady state coherence is mediated by the population imbalance between the molecules and, therefore, {\it increases} with the energy difference between the two-level atoms. Our results establish the importance of collective decay processes in the study of ultrafast photophysics, and especially their potential role to generate stationary coherence in incoherently driven quantum transport. Comment: 10 pages, 3 figures |
| Databáze: | OpenAIRE |
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