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Specific Heat of Electron Plasma Waves
Physical Review Letters ( IF 8.1 ) Pub Date : 2023-05-31 , DOI: 10.1103/physrevlett.130.225101
J R Rygg 1, 2, 3 , P M Celliers 4 , G W Collins 1, 2, 3
Affiliation  

Collective modes in a plasma, like phonons in a solid, contribute to a material’s equation of state and transport properties, but the long wavelengths of these modes are difficult to simulate with today’s finite-size quantum simulation techniques. A simple Debye-type calculation of the specific heat of electron plasma waves is presented, yielding up to 0.05k/e for warm dense matter (WDM), where thermal and Fermi energies are near 1Ry=13.6eV. This overlooked energy reservoir is sufficient to explain reported compression differences between theoretical hydrogen models and shock experiments. Such an additional specific heat contribution refines our understanding of systems passing through the WDM regime, such as the convective threshold in low-mass main-sequence stars, white dwarf envelopes, and substellar objects; WDM x-ray scattering experiments; and the compression of inertial confinement fusion fuels.

中文翻译:

电子等离子体波的比热

等离子体中的集体模式,就像固体中的声子一样,有助于材料的状态方程和传输特性,但这些模式的长波长很难用当今的有限尺寸量子模拟技术来模拟。提出了电子等离子体波比热的简单德拜型计算,产生高达0.05k/电子对于热致密物质 (WDM),其中热能和费米能接近1个=13.6电子伏特. 这个被忽视的能量库足以解释理论氢模型和冲击实验之间报告的压缩差异。这种额外的比热贡献加深了我们对通过 WDM 体系的系统的理解,例如低质量主序星、白矮星包层和次星体中的对流阈值;WDM x射线散射实验;以及惯性约束聚变燃料的压缩。
更新日期:2023-06-01
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