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- W4385071098 abstract "In a recent Letter [T. Dornheim et al., Phys. Rev. Lett. 121, 255001 (2018)], it was predicted on the basis of ab initio quantum Monte Carlo simulations that, in a uniform electron gas, the peak ω0 of the dynamic structure factor S(q,ω) exhibits an unusual nonmonotonic wave number dependence, where dω0/dq<0, at intermediate q, under strong coupling conditions. This effect was subsequently explained by the pair alignment of electrons [T. Dornheim et al., Commun. Phys. 5, 304 (2022)]. Here we predict that this nonmonotonic dispersion resembling the roton-type behavior known from superfluids should be observable in a dense, partially ionized hydrogen plasma. Based on a combination of path integral Monte Carlo simulations and linear response results for the density response function, we present the approximate range of densities, temperatures and wave numbers and make predictions for possible experimental observations.5 MoreReceived 21 April 2023Accepted 9 June 2023DOI:https://doi.org/10.1103/PhysRevResearch.5.033039Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasHigh-energy-density plasmasLaboratory studies of space & astrophysical plasmasPhysical SystemsQuantum plasmasWarm-dense matterTechniquesFirst-principles calculations in plasma physicsPath-integral Monte CarloPerturbative methodsX-ray scatteringPlasma Physics" @default.
- W4385071098 created "2023-07-23" @default.
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- W4385071098 date "2023-07-21" @default.
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- W4385071098 title "Prediction of a roton-type feature in warm dense hydrogen" @default.
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- W4385071098 doi "https://doi.org/10.1103/physrevresearch.5.033039" @default.
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