Accession Number:



Optimal thermal bath for robust excitation energy transfer in disordered light-harvesting complex 2 of purple bacteria

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Massachusetts Institute of Technology Cambridge United States

Personal Author(s):

Report Date:


Pagination or Media Count:



The existence of an optimal thermal bath to facilitate robust energy transfer between the spectrally separated B800 and B850 rings in light-harvesting complex 2 LH2 of purple bacteria is investigated via the multichromophoric Frster theory. Due to the inherent energy bias between the two rings, the energy transfer rate from B800 to B850 is maximized as a function of the bath coupling strength, establishing an optimization criterion. Critically, upon inclusion of energetic disorder, this maximum is averaged out. However, noting the distribution of transfer rates, we find that the bath coupling strength can yield a minimal dispersion for the rate distribution, i.e. a maximum ratio of mean to standard deviation, thus achieving maximum energy transfer robust to the effects of static disorder.

Subject Categories:

  • Non-electrical Energy Conversion
  • Theoretical Mathematics

Distribution Statement: