High Energy Density Physics最新文献

Non-interacting new agegraphic dark energy model in f(Q) gravity f(Q)引力中的非相互作用新年龄暗能量模型

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-05-27 DOI: 10.1016/j.hedp.2025.101198

M. Sharif , Madiha Ajmal

{"title":"Non-interacting new agegraphic dark energy model in f(Q) gravity","authors":"M. Sharif , Madiha Ajmal","doi":"10.1016/j.hedp.2025.101198","DOIUrl":"10.1016/j.hedp.2025.101198","url":null,"abstract":"<div><div>In this study, we explore the reconstruction of a new agegraphic dark energy model in a flat Friedmann–Robertson–Walker spacetime by <span><math><mi>f</mi></math></span> (<span><math><mi>Q</mi></math></span>) gravity framework, where <span><math><mi>Q</mi></math></span> represents non-metricity. We assume that the scale factor follows a power-law and explore how this model aligns with the expanding universe. In this perspective, we develop a new agegraphic <span><math><mi>f</mi></math></span> (<span><math><mi>Q</mi></math></span>) model and analyze the graphical behavior for cosmic evolution. We analyze physical characteristics of the model using the equation of state parameter, (<span><math><mrow><msub><mrow><mi>ω</mi></mrow><mrow><mi>D</mi></mrow></msub><mo>−</mo><msubsup><mrow><mi>ω</mi></mrow><mrow><mi>D</mi></mrow><mrow><mo>′</mo></mrow></msubsup></mrow></math></span>) and the (<span><math><mrow><mi>r</mi><mo>−</mo><mi>s</mi></mrow></math></span>) planes. The equation of state parameter indicates a quintessence era characterized by accelerated expansion. The (<span><math><mrow><msub><mrow><mi>ω</mi></mrow><mrow><mi>D</mi></mrow></msub><mo>−</mo><msubsup><mrow><mi>ω</mi></mrow><mrow><mi>D</mi></mrow><mrow><mo>′</mo></mrow></msubsup></mrow></math></span>)-plane identifies the freezing region and the Chaplygin gas model is represented in the (<span><math><mrow><mi>r</mi><mo>−</mo><mi>s</mi></mrow></math></span>)-plane. Finally, we examine the stability of the non-interacting model by evaluating the squared speed of sound. Our findings show that the non-interacting new agegraphic dark energy model effectively resolves the cosmic coincidence problem.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"56 ","pages":"Article 101198"},"PeriodicalIF":1.6,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Anisotropic spheres via embedding approach in Ricci inverse gravity 基于Ricci反重力的各向异性球体嵌入方法

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-05-26 DOI: 10.1016/j.hedp.2025.101196

Adnan Malik , Amjad Hussain , Ayesha Almas , M. Farasat Shamir , Fatemah Mofarreh

{"title":"Anisotropic spheres via embedding approach in Ricci inverse gravity","authors":"Adnan Malik , Amjad Hussain , Ayesha Almas , M. Farasat Shamir , Fatemah Mofarreh","doi":"10.1016/j.hedp.2025.101196","DOIUrl":"10.1016/j.hedp.2025.101196","url":null,"abstract":"<div><div>We present a class of anisotropic and spherically symmetric solutions characterized by the function <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>A</mi><mo>)</mo></mrow><mo>=</mo><mi>R</mi><mo>+</mo><mi>α</mi><mi>A</mi></mrow></math></span>, where <span><math><mi>R</mi></math></span> is the Ricci scalar, <span><math><mi>A</mi></math></span> is the anticurvature scalar, and <span><math><mi>α</mi></math></span> is the coupling constant. The model is constructed by applying the Karmarkar condition to determine the radial metric coefficient and assuming a specific form for the temporal metric coefficient. Boundary conditions are derived to guarantee the continuity of spacetime, utilizing the Schwarzschild solution as the exterior spacetime. A detailed analysis of various physical properties, including energy density, pressure components, anisotropic pressure, energy conditions, the equation of state, mass function, surface redshift, compactness factor, adiabatic index, sound speed, and the Tolman–Oppenheimer–Volkoff equilibrium condition, is conducted. The complete analysis is applied to two well-known stars, Her X1 and Cen X3. The results demonstrate that all physical criteria are satisfied, confirming that the solutions are physically viable and consistent with established theoretical expectations.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"56 ","pages":"Article 101196"},"PeriodicalIF":1.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Advancing the understanding of compact stars: The role of f(R,Lm,T) gravity on physical existence of two different pulsars 推进对致密恒星的认识：f（R,Lm，T）引力对两种不同脉冲星物理存在的作用

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-05-06 DOI: 10.1016/j.hedp.2025.101197

Tayyab Naseer , Komal Hassan , M. Sharif , Baiju Dayanandan , Faisal Javed

{"title":"Advancing the understanding of compact stars: The role of f(R,Lm,T) gravity on physical existence of two different pulsars","authors":"Tayyab Naseer , Komal Hassan , M. Sharif , Baiju Dayanandan , Faisal Javed","doi":"10.1016/j.hedp.2025.101197","DOIUrl":"10.1016/j.hedp.2025.101197","url":null,"abstract":"<div><div>Recent studies have demonstrated the possibility of using modified gravity theories in order to explain the sense of astronomical entities. This paper examines the dynamics of dense astronomical entities under the framework of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> gravity. We formulate gravitational equations that incorporate the characteristics of the non-isotropic static interior spacetime. By imposing two particular conditions related to the radial function and pressure anisotropy, we derive two solutions to these complex equations of motion. We encounter differential equations in both cases whose solutions involve two constants. The Darmois junction conditions are then employed to calculate these constants. Moreover, the requirement for radial pressure to vanish at the hypersurface is also significant in this analysis. Additionally, we graphically assess specific conditions that must be satisfied to ensure the model’s viability across various parameter values. For this purpose, we utilize observational data from two compact stars, Her X-1 and Cen X-3. We conclude that both models align well with the necessary criteria for viability and stability. It is important to emphasize that our study amplifies the understanding of how this modified gravity influences the interior fluid distribution of compact stars, offering invaluable revelations for future studies.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"56 ","pages":"Article 101197"},"PeriodicalIF":1.6,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Deep learning surrogate models to solve time-dependent NLTE absorption and emission spectra 求解随时间变化的NLTE吸收和发射光谱的深度学习代理模型

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-04-30 DOI: 10.1016/j.hedp.2025.101199

Jingsong Zhang , Wengu Chen , Xiaoying Han , Peng Song , Han Wang

引用次数: 0

Ion acceleration with an intense short-pulse laser and large-area suspended graphene in an extremely thin target regime 离子加速与强短脉冲激光和大面积悬浮石墨烯在极薄靶区

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-04-04 DOI: 10.1016/j.hedp.2025.101195

T. Minami , C.M. Chu , O. McCusker , K. Sakai , Y.T. Liao , N. Tamaki , Ko. Kondo , H. Kiriyama , S. Egashira , M. Ota , A. Morace , Y. Sakawa , M. Alkhimova , T. Pikuz , F. Nikaido , T. Yasui , S. Suzuki , Y. Abe , H. Habara , H.S. Kumar , Y. Kuramitsu

{"title":"Ion acceleration with an intense short-pulse laser and large-area suspended graphene in an extremely thin target regime","authors":"T. Minami , C.M. Chu , O. McCusker , K. Sakai , Y.T. Liao , N. Tamaki , Ko. Kondo , H. Kiriyama , S. Egashira , M. Ota , A. Morace , Y. Sakawa , M. Alkhimova , T. Pikuz , F. Nikaido , T. Yasui , S. Suzuki , Y. Abe , H. Habara , H.S. Kumar , Y. Kuramitsu","doi":"10.1016/j.hedp.2025.101195","DOIUrl":"10.1016/j.hedp.2025.101195","url":null,"abstract":"<div><div>Graphene is an atomic thin 2D material, known as the strongest material with such a thin regime. Free-standing, large-area suspended graphene (LSG) has been developed for a target of laser-driven ion acceleration. The LSG has shown remarkable durability against laser prepulse, producing MeV protons and carbons by direct irradiation with an intense laser without a plasma mirror, yet no optimization has been concerned. Here we investigate the optimization of the laser-driven ion acceleration with LSG, paying special attention to the target conditions. We irradiate nanometer-thick LSG with an intense laser, where the incident angle and the target thickness are controlled. The maximum proton energy increases with increasing the number of LSG layers, where <span><math><mrow><mn>25</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>3</mn><mspace></mspace><mi>MeV</mi></mrow></math></span> protons at maximum are consistently observed with Thomson parabola spectrometer and diamond-based detectors. For comparison purposes, we perform ideal numerical simulations using particle-in-cell (PIC) code without consideration of the prepulse. In the PIC simulation, the protons are successively accelerated by the electric field associated with laser radiation pressure and the surface sheath field, yet the maximum proton energies are overestimated. The maximum proton energies from the experiment asymptotically approach the ideal PIC expectations, indicating that the thinner LSG is more affected by the prepulse. We expect higher proton energy with the optimized LSG conditions and a plasma mirror.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101195"},"PeriodicalIF":1.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Exploring capabilities of Micro-Fabricated 3D-printed capsules for studying effects of material mix on thermonuclear burn 探索微制造3d打印胶囊用于研究材料混合对热核燃烧的影响的能力

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-29 DOI: 10.1016/j.hedp.2025.101194

T.A. Coffman , Y. Kim , L.M. Green , R.S. Lester , B.M. Haines , D.W. Schmidt , P. Donovan , B. Patterson , R.W. VanDervort , P.J. Adrian , P.M. Kozlowski , R.H. Dwyer , J.M. Levesque , C. Fry , A. Haid , M. Do , C. Shuldberg

{"title":"Exploring capabilities of Micro-Fabricated 3D-printed capsules for studying effects of material mix on thermonuclear burn","authors":"T.A. Coffman , Y. Kim , L.M. Green , R.S. Lester , B.M. Haines , D.W. Schmidt , P. Donovan , B. Patterson , R.W. VanDervort , P.J. Adrian , P.M. Kozlowski , R.H. Dwyer , J.M. Levesque , C. Fry , A. Haid , M. Do , C. Shuldberg","doi":"10.1016/j.hedp.2025.101194","DOIUrl":"10.1016/j.hedp.2025.101194","url":null,"abstract":"<div><div>The introduction of a high-precision, 3D-printing method, known as two-photon polymerization (2PP), has created a new means of producing novel targets to study inertial confinement fusion (ICF). This work aims to explore if 2PP fabricated capsules can meet ICF requirements such as size, uniformity, deuteration degree, and ability to maintain gas fill. Two types of capsules with 3D-printed lattices were evaluated on the Omega-60 Laser Facility: (1) carbon-deuterium-oxygen (CDO) lattice with a H<sub>2</sub> gas fill and (2) carbon-hydrogen-oxygen (CHO) lattice with a D<sub>2</sub> gas fill. Experimental results and numerical simulations, which assumed complete mixing of capsule materials, reasonably agreed for both target types. A further study into the effects of capsule preheat or 2PP geometry on material mix is underway. Our work demonstrates that the unique capabilities of customizable, 3D-printed capsules present promising opportunities for further investigation into more sophisticated mix and burn experiments in ICF.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101194"},"PeriodicalIF":1.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Exploring hybrid scalar factor and ekpyrotic bouncing cosmology in f(Q,R) Gravity 探索f（Q，R）引力中的混合标量因子和热弹跳宇宙学

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-28 DOI: 10.1016/j.hedp.2025.101188

Aimen Rauf , Bander Almutairi , A.S. Khan

{"title":"Exploring hybrid scalar factor and ekpyrotic bouncing cosmology in f(Q,R) Gravity","authors":"Aimen Rauf , Bander Almutairi , A.S. Khan","doi":"10.1016/j.hedp.2025.101188","DOIUrl":"10.1016/j.hedp.2025.101188","url":null,"abstract":"<div><div>In this study, we delve into the evolution of the Hubble parameter, focusing on its sign reversal in the early universe and its stability within <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity. Methods are employed to investigate the universe’s behavior concerning hybrid scale factor scenarios, including the sub-relativistic, radiation, ultra-relativistic, dust, and stiff fluid universes, concerning the equation of state (EoS) parameters. This research builds on previous ones by providing a more in-depth investigation of the bouncing scenarios inside the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity framework, reconstructing gravitational Lagrangians established for certain parameter values. Once rebuilt, these Lagrangians allow the examination of energy conditions required for a realistic bouncing model and give analytical answers to the ekpyrotic (Ekkart) bounce model. The function of exotic matter, renowned for its high negative pressure, is the key factor promoting the universe’s acceleration expansion. An analysis of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity theories, particularly focusing on bouncing scenarios, distinguishes this work from earlier studies on alternative gravity theories and their cosmological implications. This research offers a detailed investigation of bouncing models along with a detailed examination of the energy conditions present in <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>R</mi><mo>)</mo></mrow></mrow></math></span> gravity.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101188"},"PeriodicalIF":1.6,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The screening effect of the plasma ions on the electron-impact excitation process and subsequent polarization of X-ray photoemission 等离子体离子对电子冲击激发过程和x射线光发射的后续极化的屏蔽效应

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-28 DOI: 10.1016/j.hedp.2025.101193

Z.B. Chen , P.F. Liu , Y.Y. Qi , G.P. Zhao , H.Y. Sun

{"title":"The screening effect of the plasma ions on the electron-impact excitation process and subsequent polarization of X-ray photoemission","authors":"Z.B. Chen , P.F. Liu , Y.Y. Qi , G.P. Zhao , H.Y. Sun","doi":"10.1016/j.hedp.2025.101193","DOIUrl":"10.1016/j.hedp.2025.101193","url":null,"abstract":"<div><div>In this manuscript, we calculate the spectral properties and the electron-impact excitation cross sections in the semiclassical dense hydrogen plasmas, by solving the modified relativistic Dirac equation based on the Dirac-Coulomb Hamiltonian and using the suggested relativistic distorted wave method, respectively. The obtained cross sections are then used to study the polarization of the de-excitation X-ray photoemission, which allows a deeper probe of the electronic structural properties of the atoms/ions, thus yielding a comprehensive understanding of the underlying atomic processes. We employ the effective model potential proposed by Ramazanov et al. (2015) to replace the electron-nucleus Coulomb potential, where the former (potential) is derived for general two interacting charged particles taking into account the quantum mechanical and screening effects in semiclassical dense plasmas. Relativistic effects, including the Breit interaction and dominant quantum electrodynamics corrections, are included. Our study involves a comprehensive investigation of the screening effect of the plasma ions on the various properties such as the bound state energies, excitation energies, transition rates, electron-impact excitation cross sections and subsequent polarizations of X-ray photoemission across a wide range of plasma parameters. We compare our numerical results with other available experimental and theoretical data, showing good agreement. The outcomes of this work not only help to better understand the fundamental properties of plasmas, but also provide important applications in fusion, astrophysics, and other fields.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101193"},"PeriodicalIF":1.6,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Siegert-pseudostate formulation with B-splines 具有b样条的siegert伪态公式

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-26 DOI: 10.1016/j.hedp.2025.101191

H.B. Tran Tan, C.J. Fontes, C.E. Starrett

引用次数: 0

Exploring the generalized fifth-order (2 + 1)-dimensional KdV equation: The lump structures and collision phenomena to the shallow water under gravity and nonlinear lattice 探索广义五阶（2 + 1）维KdV方程：重力和非线性晶格作用下浅水的团块结构和碰撞现象

IF 1.6 3区物理与天体物理

High Energy Density Physics Pub Date : 2025-03-20 DOI: 10.1016/j.hedp.2025.101186

Usman Younas , Tukur Abdulkadir Sulaiman , Hajar Farhan Ismael , Patient Zihisire Muke

{"title":"Exploring the generalized fifth-order (2 + 1)-dimensional KdV equation: The lump structures and collision phenomena to the shallow water under gravity and nonlinear lattice","authors":"Usman Younas , Tukur Abdulkadir Sulaiman , Hajar Farhan Ismael , Patient Zihisire Muke","doi":"10.1016/j.hedp.2025.101186","DOIUrl":"10.1016/j.hedp.2025.101186","url":null,"abstract":"<div><div>This study deals the lump structures and interaction phenomena to the (2 + 1)-dimensional generalized fifth-order KdV (2GKdV) equation which demonstrates long wave movements under the gravity field and in a two-dimensional nonlinear lattice in shallow water. A variety of solutions like lump periodic, collision between lumps and hyperbolic solutions as well as exponential solutions, breather waves, two wave solutions are under consideration. The Hirota perturbation expansion technique with setting nonzero background wave has been adopted for investing the studied model and securing the solutions. A lump solution is a rational function solution which is real analytic and decays in all directions of space variables. Breather waves refer to solitary waves that exhibit both partial localization and periodic structure in either space or time. Breathers serve crucial functions in nonlinear physics and have been observed in various physical domains, including optics, hydrodynamics, and quantized superfluidity. The specified parameter values produce a variety of graphs with distinctive shapes to visually represent the results. The technique’s performance, clarity, and visibility are highlighted in its suitability for various nonlinear equations in computational physics and other research domains, illustrating collision-related components and solution properties.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"55 ","pages":"Article 101186"},"PeriodicalIF":1.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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