relationship between population dynamics and the self-energy in driven non-equilibrium systems
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ID: 180476
2016
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Abstract
We compare the decay rates of excited populations directly calculated within a Keldysh formalism to the equation of motion of the population itself for a Hubbard-Holstein model in two dimensions. While it is true that these two approaches must give the same answer, it is common to make a number of simplifying assumptions, within the differential equation for the populations, that allows one to interpret the decay in terms of hot electrons interacting with a phonon bath. Here, we show how care must be taken to ensure an accurate treatment of the equation of motion for the populations due to the fact that there are identities that require cancellations of terms that naively look like they contribute to the decay rates. In particular, the average time dependence of the Green’s functions and self-energies plays a pivotal role in determining these decay rates.
| Reference Key |
kemper2016entropyrelationship
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|---|---|
| Authors | ;Alexander F. Kemper;James K. Freericks |
| Journal | European journal of medicinal chemistry |
| Year | 2016 |
| DOI |
10.3390/e18050180
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| URL | |
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