Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

We investigate on the procedure of extracting a “spectral density” from mixed QM/MM calculations and employing it in open quantum systems models. In particular, we study the connection between the energy gap correlation function extracted from ground state QM/MM and the bath spectral density used as input in open quantum system approaches. We introduce a simple model which can give intuition on when the ground state QM/MM propagation will give the correct energy gap. We also discuss the role of higher order correlators of the energy-gap fluctuations which can provide useful information on the bath. Further, various semiclassical corrections to the spectral density, are applied and investigated. Finally, we apply our considerations to the photosynthetic Fenna-Matthews-Olson complex. For this system, our results suggest the use of the Harmonic prefactor for the spectral density rather than the Standard one, which was employed in the simulations of the system carried out to date.

Bibliography

Valleau, S., Eisfeld, A., & Aspuru-Guzik, A. (2012). On the alternatives for bath correlators and spectral densities from mixed quantum-classical simulations. The Journal of Chemical Physics, 137(22).

Authors 3
  1. Stéphanie Valleau (first)
  2. Alexander Eisfeld (additional)
  3. Alán Aspuru-Guzik (additional)
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Dates
Type When
Created 12 years, 8 months ago (Dec. 11, 2012, 6:48 p.m.)
Deposited 2 years, 2 months ago (June 25, 2023, 5:18 p.m.)
Indexed 1 week, 2 days ago (Aug. 27, 2025, 11:45 a.m.)
Issued 12 years, 8 months ago (Dec. 11, 2012)
Published 12 years, 8 months ago (Dec. 11, 2012)
Published Online 12 years, 8 months ago (Dec. 11, 2012)
Published Print 12 years, 8 months ago (Dec. 14, 2012)
Funders 2
  1. Deutsche Forschungsgemeinschaft 10.13039/501100001659

    Region: Europe

    gov (National government)

    Labels3
    1. German Research Association
    2. German Research Foundation
    3. DFG
    Awards1
    1. Ei 872/1-1
  2. U.S. Department of Energy 10.13039/100000015

    Region: Americas

    gov (National government)

    Labels8
    1. Energy Department
    2. Department of Energy
    3. United States Department of Energy
    4. ENERGY.GOV
    5. US Department of Energy
    6. USDOE
    7. DOE
    8. USADOE
    Awards2
    1. DE-SC0001088
    2. N66001-10-1-4060

@article{Valleau_2012, title={On the alternatives for bath correlators and spectral densities from mixed quantum-classical simulations}, volume={137}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.4769079}, DOI={10.1063/1.4769079}, number={22}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Valleau, Stéphanie and Eisfeld, Alexander and Aspuru-Guzik, Alán}, year={2012}, month=dec }