• Corpus ID: 239768790

Nonlinear electronic density response of the warm dense electron gas: multiple perturbations and mode coupling

@inproceedings{Dornheim2021NonlinearED,
title={Nonlinear electronic density response of the warm dense electron gas: multiple perturbations and mode coupling},
author={Tobias Dornheim and Jan Vorberger and Zhandos A. Moldabekov and Michael Bonitz},
year={2021}
}
We present extensive new ab initio path integral Monte Carlo (PIMC) results for an electron gas at warm dense matter conditions that is subject to multiple harmonic perturbations. In addition to the previously investigated nonlinear effects at the original wave number [Dornheim et al., PRL 125, 085001 (2020)] and the excitation of higher harmonics [Dornheim et al., PRR 3, 033231 (2021)], the presence of multiple external potentials leads to mode-coupling effects, which constitute the dominant…
1 Citations

Figures from this paper

Density-Functional-Theory Perspective on the Non-Linear Response of Correlated Electrons Across Temperature Regimes
• Physics
• 2022
We explore a new formalism to study the nonlinear electronic density response based on Kohn-Sham density functional theory (KS-DFT) at partially and strongly quantum degenerate regimes. It is

References

SHOWING 1-10 OF 91 REFERENCES
Nonlinear electronic density response of the ferromagnetic uniform electron gas at warm dense matter conditions
• Physics
Contributions to Plasma Physics
• 2021
In a recent Letter [T.~Dornheim \emph{et al.}, Phys.~Rev.~Lett.~\textbf{125}, 085001 (2020)], we have presented the first \emph{ab initio} results for the nonlinear density response of electrons in
Nonlinear density response from imaginary-time correlation functions: Ab initio path integral Monte Carlo simulations of the warm dense electron gas.
• Medicine, Physics
The Journal of chemical physics
• 2021
This work presents analogous relations between the nonlinear density response in the quadratic and cubic order of the perturbation strength and generalized ITCFs measuring correlations between up to four imaginary-time arguments.
Strongly coupled electron liquid: Ab initio path integral Monte Carlo simulations and dielectric theories
• Physics
• 2019
The strongly coupled electron liquid provides a unique opportunity to study the complex interplay of strong coupling with quantum degeneracy effects and thermal excitations. To this end, we carry out
Permutation-blocking path-integral Monte Carlo approach to the static density response of the warm dense electron gas.
• Physics, Medicine
Physical review. E
• 2017
This work investigates in detail the validity of linear response theory and demonstrates that PB-PIMC allows us to obtain highly accurate results for the static density response function and, thus, the static local field correction.
Configuration path integral Monte Carlo approach to the static density response of the warm dense electron gas.
• Physics, Medicine
The Journal of chemical physics
• 2017
It is demonstrated how the CPIMC formalism can be efficiently extended to the spatially inhomogeneous electron gas and presented the first data points and discussed finite size errors involved in the quantum Monte Carlo results for the SDRF in detail.
The static local field correction of the warm dense electron gas: An ab initio path integral Monte Carlo study and machine learning representation.
• Physics, Medicine
The Journal of chemical physics
• 2019
This work presents extensive new path integral Monte Carlo (PIMC) results for the static LFC of the uniform electron gas, which are subsequently used to train a fully connected deep neural network.
The relevance of electronic perturbations in the warm dense electron gas.
• Physics, Medicine
The Journal of chemical physics
• 2021
This work presents the first assessment of common XC functionals against exact path-integral Monte Carlo calculations of the harmonically perturbed thermal electron gas and pinpointed where the tested XCfunctionals fail when perturbations on the electronic structure are imposed.
Dynamical structure factor of strongly coupled ions in a dense quantum plasma.
• Physics, Medicine
Physical review. E
• 2019
It is found that electronic correlations lead to lower values of the ion-acoustic mode frequencies and to an extension of the applicability limit with respect to the wave-number of a hydrodynamic description.
Ab initio path integral Monte Carlo approach to the static and dynamic density response of the uniform electron gas
• Physics
Physical Review B
• 2019
In a recent Letter [T. Dornheim et al., Phys. Rev. Lett. 121, 255001 (2018)] we have presented the first ab initio results for the dynamic structure factor $S(\mathbf{q},\omega)$ of the uniform
Ab initio Path Integral Monte Carlo Results for the Dynamic Structure Factor of Correlated Electrons: From the Electron Liquid to Warm Dense Matter.
• Medicine, Physics
Physical review letters
• 2018
This work presents the first ab initio results for S(q,ω) by carrying out extensive path integral Monte Carlo simulations and developing a new method for the required analytic continuation, which is based on the stochastic sampling of the dynamic local field correction G( q,ω).