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Title: Multi-scale exciton and electron transfer in multi-level donor–acceptor systems

Journal Article · · Journal of Physics. A, Mathematical and Theoretical
 [1]; ORCiD logo [2];  [3]
  1. Weizmann Inst., Rehovot (Israel)
  2. Univ. de Guadalajara, Jalisco (Mexico)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, we study theoretically the noise-assisted quantum exciton (electron) transfer (ET) in bio-complexes consisting of a single-level electron donor and an acceptor which has a complicated internal structure, and is modeled by many electron energy levels. Interactions are included between the donor and the acceptor energy levels and with the protein–solvent noisy environment. Different regions of parameters are considered, which characterize (i) the number of the acceptor levels, (ii) the acceptor 'band-width', and (iii) the amplitude of noise and its correlation time. Under some conditions, we derive analytical expressions for the ET rate and efficiency. We obtain equal occupation of all levels at large times, independent of the structure of the acceptor band and the noise parameters, but under the condition of non-degeneracy of the acceptor energy levels. We discuss the multi-scale dynamics of the acceptor population, and the accompanying effect of quantum coherent oscillations. We also demonstrate that for a large number of levels in the acceptor band, the efficiency of ET can be close to 100%, for both downhill and uphill transitions and for sharp and flat redox potentials.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
LDRD; USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1512755
Alternate ID(s):
OSTI ID: 22656189
Report Number(s):
LA-UR--17-21300
Journal Information:
Journal of Physics. A, Mathematical and Theoretical, Journal Name: Journal of Physics. A, Mathematical and Theoretical Journal Issue: 36 Vol. 50; ISSN 1751-8113
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Modeling of noise-assisted quantum transfer between donor and acceptor with finite bandwidths journal October 2019