Contributions to Plasma Physics最新文献_第2页

Evidence of Free-Bound Transitions in Warm Dense Matter and Their Impact on Equation-of-State Measurements 热致密物质中自由界跃迁的证据及其对状态方程测量的影响

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-07-07 DOI: 10.1002/ctpp.70149

M. P. Böhme, L. B. Fletcher, A. D. Baczewski, H. M. Bellenbaum, Z. A. Moldabekov, J. Vorberger, D. A. Chapman, M. J. MacDonald, S. Schwalbe, T. R. Preston, D. Kraus, T. Gawne, F. R. Graziani, S. Hamel, T. Döppner, T. Dornheim

{"title":"Evidence of Free-Bound Transitions in Warm Dense Matter and Their Impact on Equation-of-State Measurements","authors":"M. P. Böhme, L. B. Fletcher, A. D. Baczewski, H. M. Bellenbaum, Z. A. Moldabekov, J. Vorberger, D. A. Chapman, M. J. MacDonald, S. Schwalbe, T. R. Preston, D. Kraus, T. Gawne, F. R. Graziani, S. Hamel, T. Döppner, T. Dornheim","doi":"10.1002/ctpp.70149","DOIUrl":"https://doi.org/10.1002/ctpp.70149","url":null,"abstract":"Warm dense matter (WDM) is now routinely created and probed in laboratories around the world, providing unprecedented insights into conditions achieved in stellar atmospheres, planetary interiors, and inertial confinement fusion experiments. However, the interpretation of these experiments is often filtered through models with systematic errors that are difficult to quantify. Due to the simultaneous presence of quantum degeneracy and thermal excitation, transitions in which free electrons are de-excited into thermally unoccupied bound states transferring momentum and energy to a scattered x-ray photon become viable. Here we show that such free-bound transitions are a particular feature of WDM and vanish in the limits of cold and hot temperatures. The inclusion of these transitions into the analysis of recent X-ray Thomson Scattering experiments on WDM at the National Ignition Facility and the Linac Coherent Light Source is required to obtain a physically consistent temperature from the Chihara decomposition. This interpretation is corroborated by agreement with a recently developed model-free thermometry technique and presents an important step for precisely characterizing and understanding the complex WDM state of matter.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 7-8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.70149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quenching the Hubbard Model: Comparison of Nonequilibrium Green's Function Methods 淬灭Hubbard模型：非平衡格林函数方法的比较

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-01-15 DOI: 10.1002/ctpp.70075

Jan-Philip Joost, Christopher Makait, Alexander Osterkorn, Erik Schroedter

{"title":"Quenching the Hubbard Model: Comparison of Nonequilibrium Green's Function Methods","authors":"Jan-Philip Joost, Christopher Makait, Alexander Osterkorn, Erik Schroedter","doi":"10.1002/ctpp.70075","DOIUrl":"https://doi.org/10.1002/ctpp.70075","url":null,"abstract":"We benchmark nonequilibrium Green's function (NEGF) approaches for interaction quenches in the half-filled Fermi–Hubbard model in one and two dimensions. We compare fully self-consistent two-time Kadanoff–Baym equations (KBE), the generalized Kadanoff–Baym ansatz (GKBA), and the recently developed NEGF-based quantum fluctuations approach (NEGF-QF) with second-order Born (2B) and GW self-energies. As references, we use DMRG in 1D and time-dependent perturbation theory at weak coupling. While all methods reproduce the early-time build-up of correlations (prethermalization), different deficiencies emerge during the slower relaxation in the long-time limit: KBE shows overdamped oscillations, GKBA exhibits a negative overshoot of the Fermi-surface jump, and NEGF-QF develops a prethermalization plateau with delayed relaxation. In 1D, we find that GKBA + 2B agrees best with DMRG across the explored parameter range, while QF + GW deviates the most, consistent with its reduced self-consistency. In 2D, all approaches correctly capture the momentum-dependence of the relaxation dynamics.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 7-8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.70075","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved Kelbg Potentials for Z > 1 $$ Z>1 $$ and Application to Carbon Plasmas zbbb1$$ Z>1 $$ Kelbg电位的改进及其在碳等离子体中的应用

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-04-22 DOI: 10.1002/ctpp.70130

Heather D. Whitley, Michael S. Murillo, John I. Castor, Liam G. Stanton, Lorin X. Benedict, Philip A. Sterne, James N. Glosli, Frank R. Graziani

{"title":"Improved Kelbg Potentials for \u0000 \u0000 \u0000 Z\u0000 >\u0000 1\u0000 \u0000 $$ Z>1 $$\u0000 and Application to Carbon Plasmas","authors":"Heather D. Whitley, Michael S. Murillo, John I. Castor, Liam G. Stanton, Lorin X. Benedict, Philip A. Sterne, James N. Glosli, Frank R. Graziani","doi":"10.1002/ctpp.70130","DOIUrl":"https://doi.org/10.1002/ctpp.70130","url":null,"abstract":"<div>\u0000 \u0000 In this work, we present a general form for the electron-ion diffractive potential derived from the quantum pair density matrix and fit to the improved Kelbg potential for atomic numbers up to <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>Z</mi>\u0000 <mo>=</mo>\u0000 <mn>54</mn>\u0000 </mrow>\u0000 <annotation>$$ Z=54 $$</annotation>\u0000 </semantics></math>. We apply classical molecular dynamics using the improved Kelbg potential for carbon with various forms of the Pauli potential to compute internal energies and pressures for hot, dense plasma conditions. Our results are compared to an equation of state model based on path integral Monte Carlo and density functional theory simulations to examine the extent to which the improved Kelbg potential reproduces the internal energy and pressure of carbon plasmas. The regions of validity for carbon agree generally with those derived previously for hydrogen once pressure ionization effects are incorporated. Based on our carbon results and previously published hydrogen studies, we discuss the general applicability and limitations of these potentials for equation of state studies in warm dense matter and high energy density plasmas.\u0000 </div>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 7-8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Issue Information: Contrib. Plasma Phys. 07/2026 发行信息：投稿。等离子体物理。2026年7月

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 DOI: 10.1002/ctpp.70103

引用次数: 0

Stopping Power of Electron Liquid for Slow Quantum Projectiles 慢量子射体中电子液体的停止力

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-04-22 DOI: 10.1002/ctpp.70132

Vladimir U. Nazarov, E. K. U. Gross

引用次数: 0

Generalized Beth–Uhlenbeck Entropy Formula From the Φ-Derivable Approach 基于Φ-Derivable方法的广义Beth-Uhlenbeck熵公式

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-06-15 DOI: 10.1002/ctpp.70145

David Blaschke, Gerd Röpke, Gordon Baym

引用次数: 0

Orientational Effects in the Low Pair Continuum of Aluminium 铝低对连续体中的取向效应

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-04-12 DOI: 10.1002/ctpp.70127

Thomas Gawne, Zhandos A. Moldabekov, Oliver S. Humphries, Motoaki Nakatsutsumi, Sebastian Schwalbe, Jan Vorberger, Ulf Zastrau, Tobias Dornheim, Thomas R. Preston

{"title":"Orientational Effects in the Low Pair Continuum of Aluminium","authors":"Thomas Gawne, Zhandos A. Moldabekov, Oliver S. Humphries, Motoaki Nakatsutsumi, Sebastian Schwalbe, Jan Vorberger, Ulf Zastrau, Tobias Dornheim, Thomas R. Preston","doi":"10.1002/ctpp.70127","DOIUrl":"https://doi.org/10.1002/ctpp.70127","url":null,"abstract":"We compare the predictions of the dynamic structure factor (DSF) of ambient polycrystalline aluminium from time-dependent density functional theory (TDDFT) in the pair continuum regime to recent ultrahigh resolution x-ray Thomson scattering measurements, collected at the European XFEL. TDDFT predicts strong anisotropy in the DSF at the wavenumber examined here, even with <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>q</mi>\u0000 </mrow>\u0000 <annotation>$$ q $$</annotation>\u0000 </semantics></math>-blurring accounted for. The experimental spectrum has more than sufficient resolution and signal-to-noise levels to resolve these orientation dependencies, and therefore, the orientational averaging of the polycrystalline sample is observed rigorously. Once the orientation averaging is accounted for, TDDFT is able to reproduce the experimental spectrum adequately. Finally, comparisons of predicted DSFs from jellium to experiment demonstrate the importance of accounting for lattice effects in modelling the spectrum from a polycrystal.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 7-8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.70127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetic Contribution to the Arbitrary Order Odd Frequency Moments of the Dynamic Structure Factor 动力结构因子的任意阶奇频矩的动力学贡献

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-03-10 DOI: 10.1002/ctpp.70090

Panagiotis Tolias, Tobias Dornheim, Jan Vorberger

引用次数: 0

Ultrafast Transitions in X-Ray Irradiated Solids x射线辐照固体中的超快跃迁

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-03-10 DOI: 10.1002/ctpp.70095

Sebastião Antunes, Konrad J. Kapcia, Vladimir Lipp, Beata Ziaja

引用次数: 0

Reweighting Scheme for the Calculation of Grand-Canonical Expectation Values in Quantum Monte Carlo Simulations With a Fermion Sign Problem 费米子符号问题下量子蒙特卡罗模拟中大规范期望值计算的重加权方案

IF 1.1 4区物理与天体物理

Contributions to Plasma Physics Pub Date : 2026-09-29 Epub Date: 2026-03-10 DOI: 10.1002/ctpp.70091

Paul Hamann, Jan Vorberger, Tobias Dornheim

{"title":"Reweighting Scheme for the Calculation of Grand-Canonical Expectation Values in Quantum Monte Carlo Simulations With a Fermion Sign Problem","authors":"Paul Hamann, Jan Vorberger, Tobias Dornheim","doi":"10.1002/ctpp.70091","DOIUrl":"https://doi.org/10.1002/ctpp.70091","url":null,"abstract":"Ab initio path integral Monte Carlo (PIMC) simulations constitute the gold standard for the estimation of a broad range of equilibrium properties of a host of interacting quantum many-body systems spanning a broad range of conditions from ultracold atoms to warm dense quantum plasmas. A key practical limitation is given by the notorious fermion sign problem, which manifests as an exponential computational bottleneck with respect to system size and inverse temperature. In practice, the sign problem is particularly severe in the grand-canonical ensemble, where the bosonic and fermionic configuration spaces differ not only with respect to the symmetry of the thermal density matrix but, crucially, also with respect to the particle number distribution for a given chemical potential μ [T. Dornheim, J. Phys. A 54, 335001 (2021)]. Here, we present a simple reweighting scheme that basically allows one to retain access to grand-canonical expectation values at the cost of fermionic PIMC simulations in the canonical ensemble for the largest significant particle number in the fermionic sector. As a practical example, we consider the warm dense electron gas, which has attracted considerable recent attention due to its relevance, e.g., for the modeling of compact astrophysical objects and inertial fusion energy applications.","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"66 7-8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.70091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0