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  Gain and loss in open quantum systems

Eleuch, H., & Rotter, I. (2017). Gain and loss in open quantum systems. Physical Review E, 95(6): 062109. doi:10.1103/PhysRevE.95.062109.

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Eleuch, Hichem1, Autor
Rotter, Ingrid2, Autor           
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1external, ou_persistent22              
2Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 Zusammenfassung: Photosynthesis is the basic process used by plants to convert light energy in reaction centers into chemical energy. The high efficiency of this process is not yet understood today. Using the formalism for the description of open quantum systems by means of a non-Hermitian Hamilton operator, we consider initially the interplay of gain (acceptor) and loss (donor). Near singular points it causes fluctuations of the cross section which appear without any excitation of internal degrees of freedom of the system. This process occurs therefore very quickly and with high efficiency. We then consider the excitation of resonance states of the system by means of these fluctuations. This second step of the whole process takes place much slower than the first one, because it involves the excitation of internal degrees of freedom of the system. The two-step process as a whole is highly efficient, and the decay is biexponential. We provide, if possible, the results of analytical studies, otherwise characteristic numerical results. The similarities of the obtained results to light harvesting in photosynthetic organisms are discussed.

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Sprache(n): eng - English
 Datum: 20172017-06-08
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: ISI: 000402932300002
DOI: 10.1103/PhysRevE.95.062109
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Titel: Physical Review E
  Andere : Phys. Rev. E
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Melville, NY : American Physical Society
Seiten: - Band / Heft: 95 (6) Artikelnummer: 062109 Start- / Endseite: - Identifikator: ISSN: 1539-3755
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012