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On the memory kernel and the reduced system propagator

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5047446· OSTI ID:1543880
 [1];  [2];  [3];  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  2. Univ. of Colorado, Denver, CO (United States). Dept. of Chemistry
  3. Univ. of Freiburg, Freiburg (Germany). Inst. of Physics
We relate the memory kernel in the Nakajima–Zwanzig–Mori time-convolution approach to the reduced system propagator which is often used to obtain the kernel in the Tokuyama–Mori time-convolutionless approach. The connection provides a robust and simple formalism to compute the memory kernel for a generalized system-bath model circumventing the need to compute high order system-bath observables, thus streamlining the use of numerically exact solvers for calculating the memory kernel. We illustrate this for a model system with electron-electron and electron-phonon couplings, driven away from equilibrium.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1543880
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 10 Vol. 149; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Photoexcited charge carrier behaviors in solar energy conversion systems from theoretical simulations journal August 2019
Five approaches to exact open-system dynamics: Complete positivity, divisibility, and time-dependent observables journal July 2019
Theoretical study of charge carrier transport in organic molecular crystals using the Nakajima-Zwanzig-Mori generalized master equation journal June 2019
Five approaches to exact open-system dynamics: Complete positivity, divisibility and time-dependent observables text January 2019

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