Review of the first charged-particle transport coefficient comparison workshop

Grabowski, Paul E.; Hansen, Ole; Murillo, Michael S.; Stanton, Liam; Graziani, Frank; Zylstra, A. B.; Baalrud, Scott; Arnault, Philippe; Baczewski, Andrew David; Benedict, Lorin X.; Blancard, C.; Čertı́k, Ondřej; Clérouin, Jean; Collins, L. A.; Copeland, Sean R.; Correa, Alfredo A.; Dai, Jiayu; Daligault, Jérôme; Desjarlais, M. P.; Dharma‐wardana, M. W. C.; Faussurier, G.; Haack, J.; Haxhimali, Tomorr; Hayes-Sterbenz, Anna Catherine; Hou, Yuxin; Hu, Suxing; Jensen, D.H.; Jungman, Gerard; Kagan, Grigory; Kang, Dongdong; Kress, Joel D.; Ma, Qian; Marciante, Mathieu; Meyer, Edmund; Rudd, Robert E.; Saumon, D.; Shulenburger, Luke; Singleton, Robert L.; Sjostrom, Travis; Stanek, Lucas J.; Starrett, C. E.; Ticknor, Christopher; Valaitis, S.; Venzke, Joel; White, Alexander

doi:10.1016/j.hedp.2020.100905

Cited by 64 publications

(20 citation statements)

References 149 publications

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“…This elementary Hamiltonian captures the fundamental physics that leads to the proposed modes. Likewise, it is motivated by the fact that electronic oscillations in WDM are well described by the UEG due to the relatively weak electron-ion coupling 46 , 68 , 69 . In Eq.…”

Section: Resultsmentioning

confidence: 99%

Thermal excitation signals in the inhomogeneous warm dense electron gas

Moldabekov

Dornheim

Cangi

2022

Sci Rep

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We investigate the emergence of electronic excitations from the inhomogeneous electronic structure at warm dense matter parameters based on first-principles calculations. The emerging modes are controlled by the imposed perturbation amplitude. They include satellite signals around the standard plasmon feature, transformation of plasmons to optical modes, and double-plasmon modes. These modes exhibit a pronounced dependence on the temperature. This makes them potentially invaluable for the diagnostics of plasma parameters in the warm dense matter regime. We demonstrate that these modes can be probed with present experimental techniques.

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Section: Resultsmentioning

confidence: 99%

Thermal excitation signals in the inhomogeneous warm dense electron gas

Moldabekov

Dornheim

Cangi

2022

Sci Rep

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“…Specifically, going beyond LRT is a crucial step for understanding and exploring the effective ion-ion attraction in the media with strongly correlated electrons [88,89], which remains to be an unsolved problem [90,91]. Additionally, the effect of electronic strong correlations on a projectile energy dissipation (stopping power) is one of the long standing problems in WDM [92,93], which can be addressed using the non-linear response theory [73].…”

Section: Summary and Discussionmentioning

confidence: 99%

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

Dornheim¹,

Vorberger²,

Moldabekov³

et al. 2021

Preprint

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“…These inherent complexities lead to the failure of perturbative techniques, resulting in differences in predictions of important quantities. While different models generally agree on the thermodynamic and acoustic properties [5,6], important quantities such as transport coefficients can differ by up to an order of magnitude [7,8].…”

Section: Introductionmentioning

confidence: 99%

An Investigation into the Approximations Used in Wave Packet Molecular Dynamics for the Study of Warm Dense Matter

Angermeier

White

2021

Plasma

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Wave packet molecular dynamics (WPMD) has recently received a lot of attention as a computationally fast tool with which to study dynamical processes in warm dense matter beyond the Born–Oppenheimer approximation. These techniques, typically, employ many approximations to achieve computational efficiency while implementing semi-empirical scaling parameters to retain accuracy. We investigated three of the main approximations ubiquitous to WPMD: a restricted basis set, approximations to exchange, and the lack of correlation. We examined each of these approximations in regard to atomic and molecular hydrogen in addition to a dense hydrogen plasma. We found that the biggest improvement to WPMD comes from combining a two-Gaussian basis with a semi-empirical correction based on the valence-bond wave function. A single parameter scales this correction to match experimental pressures of dense hydrogen. Ultimately, we found that semi-empirical scaling parameters are necessary to correct for the main approximations in WPMD. However, reducing the scaling parameters for more ab-initio terms gives more accurate results and displays the underlying physics more readily.

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Review of the first charged-particle transport coefficient comparison workshop

Cited by 64 publications

References 149 publications

Thermal excitation signals in the inhomogeneous warm dense electron gas

Thermal excitation signals in the inhomogeneous warm dense electron gas

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

An Investigation into the Approximations Used in Wave Packet Molecular Dynamics for the Study of Warm Dense Matter

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