Chinese Journal of Physics最新文献

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A novel fractional hybrid nanofluid model for blood flow in a stenosed artery with a peripheral plasma layer: Narrowing the gap between Bingham’s model and experiments 一种新的带有外周血浆层的狭窄动脉血流的分数混合纳米流体模型:缩小Bingham模型和实验之间的差距
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-21 DOI: 10.1016/j.cjph.2025.06.011
M. Omama , Ayman A. Arafa , Ahmed Elsaid , Takahiko Miyazaki , Waheed K. Zahra
{"title":"A novel fractional hybrid nanofluid model for blood flow in a stenosed artery with a peripheral plasma layer: Narrowing the gap between Bingham’s model and experiments","authors":"M. Omama ,&nbsp;Ayman A. Arafa ,&nbsp;Ahmed Elsaid ,&nbsp;Takahiko Miyazaki ,&nbsp;Waheed K. Zahra","doi":"10.1016/j.cjph.2025.06.011","DOIUrl":"10.1016/j.cjph.2025.06.011","url":null,"abstract":"<div><div>Understanding blood flow is crucial for improving drug delivery, cardiovascular health, and treatments. This study introduces a novel fractional model for blood flow in stenosed arteries using a <span><math><msub><mrow><mi>TiO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>-<span><math><mi>Au</mi></math></span> hybrid nanofluid within a two-fluid framework. Red blood cells are modeled as a non-Newtonian Bingham fluid, while plasma is treated as a Newtonian fluid. The formulation incorporates a fractional-order momentum equation, a dual-phase lag fractional energy equation, considering phase lags, a magnetic field, porosity, and thermal radiation. The use of fractional calculus in combination with the two-phase flow approach is intended to capture the complex rheological behavior of blood, including memory effects and non-local characteristics that are often neglected in traditional models. This approach aims to enhance the accuracy of the classical Bingham model and bridge the noticeable gap between its predictions and experimental results. Finite difference methods with Caputo L1 fractional derivatives solve the dimensionless equations. Key parameters analyzed include the Hartmann number, thermal radiation, Darcy number, and fractional orders (<span><math><msub><mrow><mi>α</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>, <span><math><msub><mrow><mi>α</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>, <span><math><mi>β</mi></math></span>). Results reveal their impact on velocity, temperature, flow rate, wall shear stress, and the Nusselt number. It is found that the fractional Bingham model with plasma outperforms classical models across all degrees of stenosis when compared to experimental data, most notably in mild stenosis, with only a 0.3% error in time-averaged velocity. For the fractional Bingham model, a fractional order of <span><math><msub><mrow><mi>α</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span> = 0.6 aligns best with experimental results across all three stenosis cases, while the hybrid nanofluid enhances both flow and heat transfer. These findings offer insights for biomedical applications, including therapeutic interventions and device design.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 983-1010"},"PeriodicalIF":4.6,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Multiparty-controlled remote control without multipartite entanglement 多方控制的遥控器,没有多方纠缠
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-20 DOI: 10.1016/j.cjph.2025.06.028
Jia Hao , Yu-Guang Yang , Yue-Chao Wang , Guang-Bao Xu , Dong-Huan Jiang , Yi-Hua Zhou , Wei-Min Shi
{"title":"Multiparty-controlled remote control without multipartite entanglement","authors":"Jia Hao ,&nbsp;Yu-Guang Yang ,&nbsp;Yue-Chao Wang ,&nbsp;Guang-Bao Xu ,&nbsp;Dong-Huan Jiang ,&nbsp;Yi-Hua Zhou ,&nbsp;Wei-Min Shi","doi":"10.1016/j.cjph.2025.06.028","DOIUrl":"10.1016/j.cjph.2025.06.028","url":null,"abstract":"<div><div>The multipartite Greenberger-Horne-Zeilinger (GHZ) state is an important resource in multiparty-controlled remote control protocols. However, its fragility and low intensity limit the practical applications of these protocols with current technologies. Here, we present a multiparty-controlled remote control protocol without multipartite entanglement. Then, we analyze the performance of our protocol under certain types of noise, and compare our protocol with existing GHZ-state-based protocols. We also show that our protocol exhibits a unique advantage: it can tolerate an arbitrary number of nonresponsive agents. This study provides a practical pathway for multiparty-controlled remote control.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 1035-1046"},"PeriodicalIF":4.6,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Band gap analysis of a locally resonant meta-beam with a low-frequency, stiffness-adjustable buckled beam–spring–mass resonator 低频可调刚度屈曲梁-弹簧-质量谐振器局部谐振元梁带隙分析
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-20 DOI: 10.1016/j.cjph.2025.06.027
Y.X. Hao, Y. Xu, H.D. Xia
{"title":"Band gap analysis of a locally resonant meta-beam with a low-frequency, stiffness-adjustable buckled beam–spring–mass resonator","authors":"Y.X. Hao,&nbsp;Y. Xu,&nbsp;H.D. Xia","doi":"10.1016/j.cjph.2025.06.027","DOIUrl":"10.1016/j.cjph.2025.06.027","url":null,"abstract":"<div><div>This study analyzes the bandgap characteristics of a locally resonant meta-beam (LRMB) incorporating buckled beam-spring-mass (BSM) low-frequency resonators. These resonators are strategically positioned on the top and bottom surfaces of the foundational beam, enabling adjustable stiffness. The BSM is implemented using a horizontally arranged Euler-Bernoulli buckled beam, a vertically installed positive stiffness linear spring, and a mass block. The axially compressed buckling beam provides variable negative stiffness by adjusting the compression levels within the first buckling mode shape. The subsequent sections address the static characteristics, stiffness adjustment methods, and the performance of the BSM resonator. Analyzing the real band structures for the infinite meta-beam utilizes the governing equations and the metamaterial beam model. This investigation employs the plane wave expansion method and Bloch's theorem to examine the low-frequency band gap. Finite element analyses on a restricted set of BSM resonators show significant suppression of vibration propagation within the band gap, particularly near the natural frequency of the BSM. The bending wave's propagation characteristics are also presented to validate the theoretical bandgap meta-beam. The discussion focuses on assessing the influence of lattice constant, resonator damping, and mass block on the band gap feature.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 1047-1064"},"PeriodicalIF":4.6,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Impact of non-conservative gravity on massive compact objects: Insights from MIT bag model 非保守重力对大质量致密物体的影响:来自MIT袋模型的见解
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-20 DOI: 10.1016/j.cjph.2025.06.008
Hammad Nazar , Abdul Majeed , Ghulam Abbas , Asifa Ashraf , Awad A. Ibraheem , Erkaboy Davletov
{"title":"Impact of non-conservative gravity on massive compact objects: Insights from MIT bag model","authors":"Hammad Nazar ,&nbsp;Abdul Majeed ,&nbsp;Ghulam Abbas ,&nbsp;Asifa Ashraf ,&nbsp;Awad A. Ibraheem ,&nbsp;Erkaboy Davletov","doi":"10.1016/j.cjph.2025.06.008","DOIUrl":"10.1016/j.cjph.2025.06.008","url":null,"abstract":"<div><div>In recent years, the investigation of physically viable massive compact objects within the framework of non-conservative theories of gravity has attracted considerable attention from the astrophysical community. The inclusion of realistic matter sources, such as those described by the MIT bag model. In this analysis, we explore new structural properties of a static, anisotropic, and spherically symmetric compact sphere, incorporating the characteristics of strange-quark matter as described by the simplest phenomenological profile of the MIT bag model. To achieve this, we derive a general class of exact solutions to the modified field equations within the cosmologically well-consistent <span><math><mrow><mi>R</mi><mo>+</mo><mn>2</mn><mi>β</mi><mi>T</mi></mrow></math></span> gravity model. This is accomplished by employing the Tolman-<span><math><mrow><mi>I</mi><mi>V</mi></mrow></math></span> spacetime as a seed solution in conjunction with the bag Model profile. The bag constant <span><math><msub><mrow><mi>B</mi></mrow><mrow><mi>g</mi></mrow></msub></math></span> and other unknown parameters are determined by smooth boundary matching between the interior and exterior geometries at the hypersurface. Based on these obtained values, we rigorously examine and validate our model solutions against observational data from the well-known compact star candidate <span><math><mrow><mn>4</mn><mi>U</mi><mn>1608</mn><mo>−</mo><mn>52</mn></mrow></math></span>. This is achieved by testing various physical conditions, including the viability of spacetime functions, the physical credibility of matter components, the feasibility of state variables, and the fulfillment of energy conditions, alongside several stability constraints. Additionally, we analyze structural properties such as the mass–radius relation, compactification factor, surface redshift, and moment of inertia to ensure the model’s stability and physical reliability. Interestingly, our investigation predicts that the optimal mass and compactness of the strange-quark compact star candidate exceed observational data, providing strong implications within this alternative gravity framework. This suggests that such a model has the potential to surpass conventional observational predictions. Ultimately, our findings robustly confirm that the presented outcomes are physically viable and well-consistent, effectively simulating a stable ultra-dense strange-quark star akin to the formation of massive neutron stars. These results offer novel insights into the relativistic modeling of stellar astrophysical phenomena, emphasizing the intricate interplay between alternative gravity theories and strange-quark matter distributions.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 1083-1105"},"PeriodicalIF":4.6,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Couple stress effects on thermosolutal convection in Navier–Stokes–Voigt fluid 耦合应力对Navier-Stokes-Voigt流体热溶质对流的影响
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-19 DOI: 10.1016/j.cjph.2025.06.006
Deepak Kumar , Sunil , Reeta Devi
{"title":"Couple stress effects on thermosolutal convection in Navier–Stokes–Voigt fluid","authors":"Deepak Kumar ,&nbsp;Sunil ,&nbsp;Reeta Devi","doi":"10.1016/j.cjph.2025.06.006","DOIUrl":"10.1016/j.cjph.2025.06.006","url":null,"abstract":"<div><div>The present study advances the theoretical understanding of thermosolutal convection in a Navier–Stokes–Voigt fluid with couple stresses, which is relevant to a range of industrial, biomedical, and geophysical processes involving fluid transport as well as heat and mass transfer. This study aims to analyze the influence of couple stresses, solute gradients, and viscoelasticity on the onset of both stationary and oscillatory convection in the Navier–Stokes–Voigt fluid. Linear and nonlinear stability analyses are performed by formulating eigenvalue problems using the normal mode technique and the energy method, respectively. These eigenvalue problems are solved via a single-term Galerkin method to determine the Rayleigh number. The identical Rayleigh numbers obtained confirm the absence of subcritical instabilities and indicate global stability within the studied parameter range. Couple stresses, solute gradients, and viscoelasticity influence the onset and characteristics of oscillatory convection, either promoting or inhibiting instabilities depending on their relative strengths. Both couple stresses and solute gradients stabilize the convective system. Additionally, viscoelasticity does not affect the onset of stationary convection but significantly enhances the stability of oscillatory convection.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 1020-1034"},"PeriodicalIF":4.6,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Influence of Yano-Schrodinger gravity on stellar structures 雅诺-薛定谔引力对恒星结构的影响
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-18 DOI: 10.1016/j.cjph.2025.05.034
Adnan Malik , Zoya Asghar , M. Farasat Shamir , Wenbin Lin
{"title":"Influence of Yano-Schrodinger gravity on stellar structures","authors":"Adnan Malik ,&nbsp;Zoya Asghar ,&nbsp;M. Farasat Shamir ,&nbsp;Wenbin Lin","doi":"10.1016/j.cjph.2025.05.034","DOIUrl":"10.1016/j.cjph.2025.05.034","url":null,"abstract":"<div><div>This study delves into the dynamics of stellar objects within the framework of Yano-Schrödinger gravity. We adopt the Krori-Barua metric potentials, <span><math><mrow><mi>ν</mi><mrow><mo>(</mo><mi>r</mi><mo>)</mo></mrow><mo>=</mo><mi>B</mi><msup><mrow><mi>r</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>+</mo><mi>C</mi><mspace></mspace><mtext>and</mtext><mspace></mspace><mi>λ</mi><mrow><mo>(</mo><mi>r</mi><mo>)</mo></mrow><mo>=</mo><mi>A</mi><msup><mrow><mi>r</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>,</mo></mrow></math></span> where <span><math><mrow><mi>A</mi><mo>,</mo><mi>B</mi></mrow></math></span>, and <span><math><mi>C</mi></math></span> are constants, to characterize the internal structure of these stars. By imposing boundary conditions with the Schwarzschild solution as the external geometry, we explore the stellar profiles using Yano-Schrödinger gravity for a spherically symmetric framework. Our analysis provides a detailed graphical depiction of energy density, radial and tangential pressures, anisotropy, and adiabatic index. Moreover, we evaluate the equilibrium state through the modified Tolman–Oppenheimer–Volkoff equation. We further investigate key attributes of compact stars, such as the mass–radius relationship, compactness factor, and redshift function. The results demonstrate that all aspects are fulfilled, affirming the stability and physical viability of the considered stellar models.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 840-850"},"PeriodicalIF":4.6,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Improving the key rate of decoy state-based QKD scheme using self-healing technique 利用自愈技术提高基于诱饵状态的QKD方案的密钥率
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-18 DOI: 10.1016/j.cjph.2025.06.021
Supriyo Banerjee , Biswajit Maiti , Banani Saha
{"title":"Improving the key rate of decoy state-based QKD scheme using self-healing technique","authors":"Supriyo Banerjee ,&nbsp;Biswajit Maiti ,&nbsp;Banani Saha","doi":"10.1016/j.cjph.2025.06.021","DOIUrl":"10.1016/j.cjph.2025.06.021","url":null,"abstract":"<div><div>In any QKD scheme, a train of encoded laser pulses is shared between legitimate users as a raw key. The actual key is extracted from the raw key by eliminating eavesdropping and other loss factors in the communication channel. Several pulses are used in error estimation and correction, resulting in a low key generation rate. It can be improved by reducing losses in the communication channel and the probability of eavesdropping. That can effectively be done by reducing the amount of physical communication. The self-healing technique of physical communication at alternate time intervals and no communication in between is proposed and implemented in the decoy-state-based quantum key distribution (QKD) protocol. Legitimate users can generate the uncommunicated state from the pre- and post-communicated states. Since physical communication is reduced by half, loss of the signal states in the channel and eavesdropping are reduced; it is analyzed and assessed. Security analysis reveals that the key generation rate and the length of secure communication are improved. Data encryption is done through phase-encoded weak coherent laser pulses. In the proposed protocol, legitimate users use a pre-shared one-way function to select bases and intensities of the signal states. Both participate in setting the argument of the one-way function. It ensures user authentication, and no separate authentication protocol is required. This, in turn, eliminates the man-in-the-middle attack.</div><div>The one-way function ensures a basis correlation between the subsequent pulses and, to some extent, intensity correlation. It helps legitimate users encode and decode the signal and reduces measurement uncertainty. But, the one-way function being unknown to Eve, the signal states are random to her. So, her measurement is subject to quantum uncertainty. The self-healing technique further complicates the situation as Eve has no access to the uncommunicated pulses. From that point of view, the data leakage to Eve is less. However, Eve’s intervention may create little loss of signal states. The proposed self-healing technique allows for its complete identification and assessment. An error bound corresponding to it is determined, and the key generation rate is calculated.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 1129-1143"},"PeriodicalIF":4.6,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Fast preparation of three-dimensional entangled states by designing the evolution operators 通过设计演化算子快速制备三维纠缠态
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-18 DOI: 10.1016/j.cjph.2025.06.005
C.Q. Wang , S. He , J. Wang , Z.M. Zhang , L. Dong , X.M. Xiu , Y.Q. Ji
{"title":"Fast preparation of three-dimensional entangled states by designing the evolution operators","authors":"C.Q. Wang ,&nbsp;S. He ,&nbsp;J. Wang ,&nbsp;Z.M. Zhang ,&nbsp;L. Dong ,&nbsp;X.M. Xiu ,&nbsp;Y.Q. Ji","doi":"10.1016/j.cjph.2025.06.005","DOIUrl":"10.1016/j.cjph.2025.06.005","url":null,"abstract":"<div><div>Different from multi-partite two-dimensional entanglement, multi-partite high-dimensional entanglement shows stronger robustness and higher security in quantum information processing (QIP) tasks. Here, we use the method of designing the evolution operators to construct shortcuts to adiabatic passages (STAP) that enable the system to evolve along nonadiabatic shortcut. By choosing appropriate free parameters to control the pulses and setting appropriate boundary conditions, the fast preparation of three-dimensional entangled states of two atoms can be successfully achieved in just one step. In addition, we not only demonstrate the robustness and effectiveness of this scheme, but also show its high fidelity under present experimental conditions. Finally, we realize the fast preparation of the high-dimensional entangled states of two atoms based on the same principle.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 732-745"},"PeriodicalIF":4.6,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Nuclear structure and β decay properties of astrophysical significant A  = 56 isobars 天体物理意义的A = 56等压线的核结构和β衰变性质
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-17 DOI: 10.1016/j.cjph.2025.05.038
Wajeeha Khalid , Abdul Kabir , Jameel-Un Nabi
{"title":"Nuclear structure and β decay properties of astrophysical significant A  = 56 isobars","authors":"Wajeeha Khalid ,&nbsp;Abdul Kabir ,&nbsp;Jameel-Un Nabi","doi":"10.1016/j.cjph.2025.05.038","DOIUrl":"10.1016/j.cjph.2025.05.038","url":null,"abstract":"<div><div>This study explores the ground-state properties and weak transition rates of <span><math><mi>A</mi></math></span>=56 isobars including <sup>56</sup>Ni, <sup>56</sup>Co, <sup>56</sup>Fe, <sup>56</sup>Mn, <sup>56</sup>Cr and <sup>56</sup>V. The nuclear ground-state properties of selected nuclei were examined using the relativistic mean field (RMF) model. The RMF model with density-dependent interactions DDME2 and DDPC1 is utilized to analyze the deformation parameters, potential energy curves and surfaces, neutron skin thickness, neutron separation energies and nuclear radii. The deformation parameter computed via the RMF model is then utilized as an input parameter in the proton–neutron quasiparticle random phase approximation (pn-QRPA) model for the analysis of the Gamow–Teller (GT) strength distributions, half-lives and the stellar rates. The computed GT strength distributions align well with the experimental values and the predicted <span><math><mi>β</mi></math></span> decay half-lives are within factor 10 of the measured data. Stellar rates [(<span><math><mrow><msup><mrow><mi>β</mi></mrow><mrow><mo>+</mo></mrow></msup><mo>+</mo><mi>E</mi><mi>C</mi></mrow></math></span>) and (<span><math><mrow><msup><mrow><mi>β</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>+</mo><mi>P</mi><mi>C</mi></mrow></math></span>)] were computed and compared with earlier computations based on the large-scale shell model (LSSM) and the independent particle model (IPM). For selected isobars, at high-density regime with increasing core temperature, the (<span><math><mrow><msup><mrow><mi>β</mi></mrow><mrow><mo>+</mo></mrow></msup><mo>+</mo><mi>E</mi><mi>C</mi></mrow></math></span>) rates calculated using the pn-QRPA model were up to an order of magnitude lower than those obtained with the LSSM and IPM models. The computed (<span><math><mrow><msup><mrow><mi>β</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>+</mo><mi>P</mi><mi>C</mi></mrow></math></span>) rates were up to six orders of magnitude smaller than those obtained from the LSSM and IPM calculations. The computed stellar rates could provide valuable inputs for <span><math><mrow><mi>r</mi><mi>p</mi></mrow></math></span>-process nucleosynthesis simulations of the post-core silicon burning phases in stellar evolution.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 746-756"},"PeriodicalIF":4.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Response surface methodology for Darcy–Forchheimer convective flow of Williamson nanofluid: A sensitivity analysis Williamson纳米流体Darcy-Forchheimer对流的响应面方法:敏感性分析
IF 4.6 2区 物理与天体物理
Chinese Journal of Physics Pub Date : 2025-06-15 DOI: 10.1016/j.cjph.2025.06.001
Dilawar Hussain , Hulin Huang , Aliya Batool , Zakir Hussain
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