Physics Letters A最新文献_第9页

Construction, Lax integrability, bilinearization and multi-soliton solutions of a defocusing/focusing nonlocal extended modified Korteweg-de Vries equation 散焦/聚焦非局部扩展修正Korteweg-de Vries方程的构造、Lax可积性、双线性化和多孤子解

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-10 DOI: 10.1016/j.physleta.2025.130528

Hao-Dong Liu, Bo Tian, Xiao-Tian Gao, Hong-Wen Shan

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Thermoelastic properties of CaO under high hydrostatic pressure using equations of state 利用状态方程分析高静水压下 CaO 的热弹性特性

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-08 DOI: 10.1016/j.physleta.2025.130532

Hamsa B. Mohammed , Siham J. AL-Faris , Manaf A. Mahammed

{"title":"Thermoelastic properties of CaO under high hydrostatic pressure using equations of state","authors":"Hamsa B. Mohammed , Siham J. AL-Faris , Manaf A. Mahammed","doi":"10.1016/j.physleta.2025.130532","DOIUrl":"10.1016/j.physleta.2025.130532","url":null,"abstract":"<div><div>Using four equations of state: Vinet EOS, Birch Murnaghan EOS, Bardeen EOS, and Brennan Stacey EOS, under high pressure and ambient temperature. This study investigates the thermoelastic characteristics of B1-CaO material, including Debye temperature, compression ratio, lattice constant, Grüneisen parameter, and isothermal bulk modulus. Calcium oxide (CaO) was selected due to its fundamental role in geophysics, materials science, and high-pressure research, particularly in understanding oxides behavior in extreme environments. The experiment showed a decrease in compression ratio with increasing expanding pressure, a finding consistent with previous EOS data, especially at pressures below 45 GPa. The isothermal bulk modulus increases with pressure, though a divergence appears between experimental data and the (B-M EOS, Vinet EOS, and Bardeen EOS) beyond 30 GPa. The thermal expansion coefficient of CaO decreases with pressure, becoming pressure-independent at high pressures. Lattice constant and Grüneisen parameter decline with pressure, highlighting atomic compression's impact on CaO's vibrational properties.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"546 ","pages":"Article 130532"},"PeriodicalIF":2.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825483","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

Measurement-induced asymmetry in bipartite networks 测量诱导的双脑网络不对称

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-08 DOI: 10.1016/j.physleta.2025.130526

A. Lowe , E. Medina-Guerra

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Gibbs paradox and thermodynamics of colloids 吉布斯悖论和胶体热力学

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-08 DOI: 10.1016/j.physleta.2025.130531

Yong Tao

{"title":"Gibbs paradox and thermodynamics of colloids","authors":"Yong Tao","doi":"10.1016/j.physleta.2025.130531","DOIUrl":"10.1016/j.physleta.2025.130531","url":null,"abstract":"<div><div>Using the “correct Boltzmann counting”, the statistical-mechanical entropy is given by <span><math><mrow><msup><mrow><mi>S</mi></mrow><mtext>stat</mtext></msup><mo>=</mo><msub><mi>k</mi><mi>B</mi></msub><mtext>ln</mtext><msub><mstyle><mi>Ω</mi></mstyle><mi>B</mi></msub><mo>−</mo><msub><mi>k</mi><mi>B</mi></msub><mtext>ln</mtext><mi>N</mi><mo>!</mo></mrow></math></span>. The factor <span><math><mrow><mo>−</mo><msub><mi>k</mi><mi>B</mi></msub><mtext>ln</mtext><mi>N</mi><mo>!</mo></mrow></math></span> has been recognized as essential for understanding the collective behavior of colloids, which are classically distinguishable particles. To account for the thermodynamics of colloids, we introduce a method to define thermodynamic entropy using the statistical-mechanical entropy <span><math><msup><mrow><mi>S</mi></mrow><mtext>stat</mtext></msup></math></span>. Our definition is formulated as a partial differential equation that links internal energy, thermodynamic entropy, and particle number. This equation inherently defines the dependence of thermodynamic entropy on particle number, thereby resolving the Gibbs paradox within classical thermodynamics. For extensive systems, this equation yields the ideal gas law, while for non-extensive systems, it may provide new physical insights. In contrast, when the Boltzmann entropy <span><math><mrow><msup><mrow><mi>S</mi></mrow><mtext>Boltz</mtext></msup><mo>=</mo><msub><mi>k</mi><mi>B</mi></msub><mtext>ln</mtext><msub><mstyle><mi>Ω</mi></mstyle><mi>B</mi></msub></mrow></math></span> is used to define thermodynamic entropy, extensiveness and the ideal gas law become incompatible.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"547 ","pages":"Article 130531"},"PeriodicalIF":2.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834731","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

Semi-Dirac electronic states in metallic layered IrSi2 compound consisting of alternate silicenes and Ir monolayers 由交替硅烷和Ir单层组成的金属层状IrSi2化合物的半狄拉克电子态

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-08 DOI: 10.1016/j.physleta.2025.130518

Xiang-Bo Xiao , Yu-Kun Ren

引用次数: 0

State-selective single- and double-electron capture in intermediate-energy in C4+ + He Collisions C4+ + He碰撞中能态选择性单电子和双电子捕获

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-08 DOI: 10.1016/j.physleta.2025.130527

H. Yin , T. Meng , P.F. Ma , B. Ren , X. Tan , Y. Wu , B. Tu , R.T. Zhang , K. Yao , J. Xiao , X. Ma , Y. Zou , B. Wei

{"title":"State-selective single- and double-electron capture in intermediate-energy in C4+ + He Collisions","authors":"H. Yin , T. Meng , P.F. Ma , B. Ren , X. Tan , Y. Wu , B. Tu , R.T. Zhang , K. Yao , J. Xiao , X. Ma , Y. Zou , B. Wei","doi":"10.1016/j.physleta.2025.130527","DOIUrl":"10.1016/j.physleta.2025.130527","url":null,"abstract":"<div><div>The charge exchange (CX) collision cross sections of highly charged ions (HCIs) and neutral atoms play a crucial role in fundamental and applied physics. An experimental study on single- and double-electron capture (SEC and DEC) processes for C<sup>4+</sup>(1<em>s</em><sup>2</sup>) - He in collision energy between 2.3 and 33.3 keV u<sup>-1</sup> was performed via the cold-target recoil-ion momentum spectroscopy (COLTRIMS) apparatus at Fudan University. For SEC, the measurement showed an increasing tendency of electrons to be captured into higher-<em>n</em> states because of the opening of new CX channels with the rise of impact energy. In the measurement of DEC, a similar gradually increasing trend was recognized from the contribution of highly excited states. A turning point was identified where the impact energy is around 20 keV u<sup>-1</sup>, beyond which the contribution of DEC to the ground state 2<em>s</em><sup>2</sup> became minimal, while that from higher excited states became dominant. In addition, we also found significant contributions to DEC arising from asymmetric configurations. This might be linked to the vital role that electron-electron interaction plays in the formation of asymmetric configurations, as described by the two-active-electron semiclassical atomic-orbital close-coupling theory. These observations serve as experimental benchmarks for theoretical calculations and plasma spectral analysis in various environments.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"546 ","pages":"Article 130527"},"PeriodicalIF":2.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824129","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

Deceleration of polar molecules by synchronous stimulated radiation force with low power light 低功率光同步受激辐射力对极性分子的减速作用

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-07 DOI: 10.1016/j.physleta.2025.130511

Jin Wei , Di Wu , Taojing Dong , Chenyu Zu , Tao Yang , Yong Xia , Jianping Yin

引用次数: 0

Dynamical behavior of passive particles with harmonic, viscous, and correlated Gaussian forces 具有谐波、粘性和相关高斯力的被动粒子的动力学行为

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-06 DOI: 10.1016/j.physleta.2025.130512

Jae Won Jung , Sung Kyu Seo , Kyungsik Kim

{"title":"Dynamical behavior of passive particles with harmonic, viscous, and correlated Gaussian forces","authors":"Jae Won Jung , Sung Kyu Seo , Kyungsik Kim","doi":"10.1016/j.physleta.2025.130512","DOIUrl":"10.1016/j.physleta.2025.130512","url":null,"abstract":"<div><div>In this paper, we study the Navier-Stokes equation and the Burgers equation for the dynamical motion of a passive particle with harmonic and viscous forces, subject to an exponentially correlated Gaussian force. As deriving the Fokker-Planck equation for the joint probability density of a passive particle, we importantly find the solution of the joint probability density by using double Fourier transforms in three-time domains, and the moments from the derived moment equation are numerically calculated. As a result, the dynamical motion of a passive particle for the probability density having two variables of the displacement and the velocity in the short-time domain takes the super-diffusive form, whereas the distribution in the long-time domain is attained to be Gaussian by analyzing only from the velocity probability density. The moment<span><math><msub><mi>μ</mi><mrow><mn>2</mn><mo>,</mo><mn>2</mn></mrow></msub></math></span> particularly scales as <span><math><mrow><mo>∼</mo><msup><mrow><mi>t</mi></mrow><mn>5</mn></msup></mrow></math></span> in the Navier-Stokes equation for <span><math><mrow><mi>τ</mi><mo>=</mo><mn>0</mn></mrow></math></span> (<span><math><mrow><mi>τ</mi><mo>=</mo></mrow></math></span>correlation time), while the moment in Burgers equation only with correlated Gaussian force reduces to <span><math><mrow><msub><mi>μ</mi><mrow><mn>2</mn><mo>,</mo><mn>2</mn></mrow></msub><mo>∼</mo><msup><mrow><mi>t</mi></mrow><mn>4</mn></msup></mrow></math></span> in <span><math><mrow><mi>t</mi><mo>></mo><mo>></mo><mi>τ</mi></mrow></math></span> and<span><math><mrow><mi>τ</mi><mo>=</mo><mn>0</mn></mrow></math></span>.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"546 ","pages":"Article 130512"},"PeriodicalIF":2.3,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829683","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

Non-Abelian braiding of Majorana zero modes in B-form single-stranded DNA with s-wave superconductor 具有s波超导体的b型单链DNA中Majorana零模式的非阿贝尔编织

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-04 DOI: 10.1016/j.physleta.2025.130515

Zhi-Xian Wang, Han-Zhao Tang

引用次数: 0

A first-principles calculation investigation on phase transitions and mechanical properties of calcite under high pressure 高压下方解石相变和机械特性的第一原理计算研究

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-04 DOI: 10.1016/j.physleta.2025.130517

Jian Zhao , Zhaolong Luan , Jiamin Wang , Wei Wang , Tingting Shi , Manchao He

{"title":"A first-principles calculation investigation on phase transitions and mechanical properties of calcite under high pressure","authors":"Jian Zhao , Zhaolong Luan , Jiamin Wang , Wei Wang , Tingting Shi , Manchao He","doi":"10.1016/j.physleta.2025.130517","DOIUrl":"10.1016/j.physleta.2025.130517","url":null,"abstract":"<div><div>Calcite is not only one of the most component of limestone but also a significant rock-forming mineral, which plays a crucial roal in various geological processes. Most prior studies have primarily focused on the effects of ambient conditions on the physicochemical and mechanical characteristics of calcite. There is a need for a more comprehensive study on the phase transitions, as well as the changes in electronic structure and mechanical properties of calcite under high pressure through detailed first-principles calculations. In the present paper, the first-principles calculations were used to study the pressure-induced phase transition of calcite in the range of 0 ∼ 25 GPa. Moreover, the atomic structures, electronic, and mechanical properties of I, II, III(b), III, and IV phases of calcite under pressure were also comprehensively investigated. The micro-scale calculation results of calcite could present valuable theoretical guidance for the study on the geological research and practical engineering.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"546 ","pages":"Article 130517"},"PeriodicalIF":2.3,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800447","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