Using the Density functional theory (DFT) based on the full potential linearized augmented plane wave (FP-LAPW) with the GGA-PBE approximation implemented in WIEN2K code, we have investigated the structural, electronic, and magnetic properties of full-Heusler rare earth-based compounds Pr₂RhZ (where Z = Al, Ga, In) in Hg₂CuTi-type and Cu₂MnAl-type configurations. The ferromagnetic- Hg₂CuTi-type structure demonstrated superior stability compared to the Cu₂MnAl-type structure at ambient conditions for all compounds with negative formation energies confirming thermodynamic stability and synthesizability and lattice parameters between 6.846 and 7.038 Å. These alloys exhibit half-metallic behavior with 100 % spin polarization, indirect band gaps (0.235–0.345 eV), and integer magnetic moments of 4 μ_B per formula unit, obeying the Slater-Pauling rule. This work highlights their promise as candidates for spintronic devices, filling a gap in rare-earth Heusler research.
{"title":"First principles study of the structural, electronic and magnetic properties of full-Heusler rare earth-based alloys Pr2RhZ (Z=Al, Ga and In)","authors":"Abdelkader Ilias Bouadi , Mahdi Abane , Mohamed Mokhtari , Fethallah Dahmane","doi":"10.1016/j.cjph.2025.11.019","DOIUrl":"10.1016/j.cjph.2025.11.019","url":null,"abstract":"<div><div>Using the Density functional theory (DFT) based on the full potential linearized augmented plane wave (FP-LAPW) with the GGA-PBE approximation implemented in WIEN2K code, we have investigated the structural, electronic, and magnetic properties of full-Heusler rare earth-based compounds Pr₂RhZ (where Z = Al, Ga, In) in Hg₂CuTi-type and Cu₂MnAl-type configurations. The ferromagnetic- Hg₂CuTi-type structure demonstrated superior stability compared to the Cu₂MnAl-type structure at ambient conditions for all compounds with negative formation energies confirming thermodynamic stability and synthesizability and lattice parameters between 6.846 and 7.038 Å. These alloys exhibit half-metallic behavior with 100 % spin polarization, indirect band gaps (0.235–0.345 eV), and integer magnetic moments of 4 μ_B per formula unit, obeying the Slater-Pauling rule. This work highlights their promise as candidates for spintronic devices, filling a gap in rare-earth Heusler research.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"100 ","pages":"Pages 163-171"},"PeriodicalIF":4.6,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074727","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}
Pub Date : 2025-11-19DOI: 10.1016/j.cjph.2025.11.016
Aocheng Yang , Yunzhou Sun , Junhua Wang , Pengfei Wang , Nan Li
This study makes predictions regarding the soliton dynamics of the Gross-Pitaevskii equation in Bose-Einstein Condensates. Based on the exact solutions for the bright and dark one-soliton obtained by the Hirota bilinear method, numerical experimental calculations are performed using two neural operator networks, namely the deep operator network (DeepONet) and the fourier neural operator (FNO). The results show that both of these two methods can successfully predict the bright solitons and dark solitons of the system, and the obtained numerical solutions have high accuracy. The FNO method is superior to DeepONet in terms of prediction accuracy, while the latter has more advantages in terms of time economy. Both methods have perfectly solved the limitations of the traditional neural network methods, such as slow prediction speed and fixed grids. The excellent results of predicting the dynamics of complex ring dark solitons (RDSs) and semi-vortex solitons also demonstrate the broad applicability of the algorithm employed. This provides a new and promising approach for deep learning methods to address the challenges of accumulable systems.
{"title":"Predicting bright and dark solitons in (2+1)-dimensional Bose-Einstein Condensates by two types of neural operator networks","authors":"Aocheng Yang , Yunzhou Sun , Junhua Wang , Pengfei Wang , Nan Li","doi":"10.1016/j.cjph.2025.11.016","DOIUrl":"10.1016/j.cjph.2025.11.016","url":null,"abstract":"<div><div>This study makes predictions regarding the soliton dynamics of the Gross-Pitaevskii equation in Bose-Einstein Condensates. Based on the exact solutions for the bright and dark one-soliton obtained by the Hirota bilinear method, numerical experimental calculations are performed using two neural operator networks, namely the deep operator network (DeepONet) and the fourier neural operator (FNO). The results show that both of these two methods can successfully predict the bright solitons and dark solitons of the system, and the obtained numerical solutions have high accuracy. The FNO method is superior to DeepONet in terms of prediction accuracy, while the latter has more advantages in terms of time economy. Both methods have perfectly solved the limitations of the traditional neural network methods, such as slow prediction speed and fixed grids. The excellent results of predicting the dynamics of complex ring dark solitons (RDSs) and semi-vortex solitons also demonstrate the broad applicability of the algorithm employed. This provides a new and promising approach for deep learning methods to address the challenges of accumulable systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"99 ","pages":"Pages 12-24"},"PeriodicalIF":4.6,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693085","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}
Pub Date : 2025-11-19DOI: 10.1016/j.cjph.2025.11.017
Zhiming Xu , Yanbin Ge , Yanqing Wang , Shengyong Xu , Di Mai , Zhuoqun Shen , Yifei Zhang , Jingxin Li , Jingjing Xu
Neural electromagnetic signals are crucial for brain information transmission, with the neural soft-matter waveguide hypothesis being a new but important model for analyzing the generation and transmission of neural signals. An innovative verification method for the hypothesis is proposed in this study: a neural signal conduction model based on this hypothesis was developed to explore how neural structural factors influence the transmission efficiency and conduction velocity of neural signals. Simulation results show that the variation pattern of conduction velocity with these factors aligns closely with that observed in previously reported electrophysiological experiments. Furthermore, in an electrophysiological experiment, waveguide characteristics of neural soft matter were demonstrated by restoring the neural propagation behavior of damaged nerve fibers through repairing their waveguide structure with oil sealing. This research confirms the accuracy and applicability of the soft-matter waveguide model through both neuro-electrophysiological and simulation experiments, offering new insights into neural encoding and suggesting its potential applications in developing electromagnetic intervention strategies for neural systems.
{"title":"Biophysical exploration of the neural soft-matter waveguide propagation hypothesis","authors":"Zhiming Xu , Yanbin Ge , Yanqing Wang , Shengyong Xu , Di Mai , Zhuoqun Shen , Yifei Zhang , Jingxin Li , Jingjing Xu","doi":"10.1016/j.cjph.2025.11.017","DOIUrl":"10.1016/j.cjph.2025.11.017","url":null,"abstract":"<div><div>Neural electromagnetic signals are crucial for brain information transmission, with the neural soft-matter waveguide hypothesis being a new but important model for analyzing the generation and transmission of neural signals. An innovative verification method for the hypothesis is proposed in this study: a neural signal conduction model based on this hypothesis was developed to explore how neural structural factors influence the transmission efficiency and conduction velocity of neural signals. Simulation results show that the variation pattern of conduction velocity with these factors aligns closely with that observed in previously reported electrophysiological experiments. Furthermore, in an electrophysiological experiment, waveguide characteristics of neural soft matter were demonstrated by restoring the neural propagation behavior of damaged nerve fibers through repairing their waveguide structure with oil sealing. This research confirms the accuracy and applicability of the soft-matter waveguide model through both neuro-electrophysiological and simulation experiments, offering new insights into neural encoding and suggesting its potential applications in developing electromagnetic intervention strategies for neural systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"99 ","pages":"Pages 63-78"},"PeriodicalIF":4.6,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749393","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}
Pub Date : 2025-11-09DOI: 10.1016/j.cjph.2025.11.007
Chao-Chien Hsu , Tsung-Han Lee , Cheng-Yu Lee , Qiu-Chun Zeng , Yen-Chun Chen , Chen-Yi Yu , Wei-Lun Hsu , Che-Chin Chen , Chih-Ming Wang
We demonstrate a hybrid optical system that integrates a meta-corrector with a conventional Cooke triplet to improve focusing performance significantly. In this study, the Cooke triplet offers primary focusing, while the meta-corrector compensates for spherical aberration with a smooth phase profile. This design enhances spatial resolution and simplifies fabrication. Experimental results show that the focal spot size decreases from 5.68 μm to 4.03 μm, approaching the diffraction-limited Airy radius of 4.11 μm, validating the effectiveness of the meta-corrector. This approach provides a promising pathway for enhancing traditional lens systems and can be extended to advanced commercial optics for compact, high-performance imaging.
{"title":"Optical performance improvement of Cooke triplet based on meta-corrector","authors":"Chao-Chien Hsu , Tsung-Han Lee , Cheng-Yu Lee , Qiu-Chun Zeng , Yen-Chun Chen , Chen-Yi Yu , Wei-Lun Hsu , Che-Chin Chen , Chih-Ming Wang","doi":"10.1016/j.cjph.2025.11.007","DOIUrl":"10.1016/j.cjph.2025.11.007","url":null,"abstract":"<div><div>We demonstrate a hybrid optical system that integrates a meta-corrector with a conventional Cooke triplet to improve focusing performance significantly. In this study, the Cooke triplet offers primary focusing, while the meta-corrector compensates for spherical aberration with a smooth phase profile. This design enhances spatial resolution and simplifies fabrication. Experimental results show that the focal spot size decreases from 5.68 μm to 4.03 μm, approaching the diffraction-limited Airy radius of 4.11 μm, validating the effectiveness of the meta-corrector. This approach provides a promising pathway for enhancing traditional lens systems and can be extended to advanced commercial optics for compact, high-performance imaging.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 981-988"},"PeriodicalIF":4.6,"publicationDate":"2025-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575898","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}
Pub Date : 2025-11-08DOI: 10.1016/j.cjph.2025.11.005
Mohammed Sobhy
New solitary, periodic, super-periodic, and kink (antikink) wave solutions for functionally graded (FG) microtubes reinforced with graphene origami (GOr) and conveying an incompressible fluid under thermal loading are obtained for the first time. Analytical and numerical investigations of nonlinear wave dynamics in the present model are presented. The model incorporates fluid-structure interaction, thermal gradients, and size-dependent material behavior within the framework of Euler-Bernoulli beam theory. The governing nonlinear motion equation is derived from Hamilton’s principle and solved using bifurcation theory to obtain various axial wave solutions. In this theory, the equilibrium points are determined and the phase portraits are plotted to specify the possible physical motion. The fourth-order Runge-Kutta method is employed to calculate the dynamic deflection response. The results reveal that increasing the GOr content, flow velocity, or length scale parameter stiffens the structure and reduces wave amplitudes, while thermal effects and shear layer stiffness enhance deformation. The impact of different GOr distributions through the microtube wall is also examined. This work provides insights into the tunable dynamic behavior of advanced nanocomposite microtubes under multiphysical environments.
{"title":"Solitary, periodic, and kink waves in some fluid-conveying graphene origami-reinforced microtubes exposed to a thermal load","authors":"Mohammed Sobhy","doi":"10.1016/j.cjph.2025.11.005","DOIUrl":"10.1016/j.cjph.2025.11.005","url":null,"abstract":"<div><div>New solitary, periodic, super-periodic, and kink (antikink) wave solutions for functionally graded (FG) microtubes reinforced with graphene origami (GOr) and conveying an incompressible fluid under thermal loading are obtained for the first time. Analytical and numerical investigations of nonlinear wave dynamics in the present model are presented. The model incorporates fluid-structure interaction, thermal gradients, and size-dependent material behavior within the framework of Euler-Bernoulli beam theory. The governing nonlinear motion equation is derived from Hamilton’s principle and solved using bifurcation theory to obtain various axial wave solutions. In this theory, the equilibrium points are determined and the phase portraits are plotted to specify the possible physical motion. The fourth-order Runge-Kutta method is employed to calculate the dynamic deflection response. The results reveal that increasing the GOr content, flow velocity, or length scale parameter stiffens the structure and reduces wave amplitudes, while thermal effects and shear layer stiffness enhance deformation. The impact of different GOr distributions through the microtube wall is also examined. This work provides insights into the tunable dynamic behavior of advanced nanocomposite microtubes under multiphysical environments.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 989-1012"},"PeriodicalIF":4.6,"publicationDate":"2025-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575900","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}
Pub Date : 2025-11-06DOI: 10.1016/j.cjph.2025.11.004
Xinyi Fu , Jing Wang , Changgui Gu , Huihui Zou
Complex biomolecular labeling systems can be regarded as flexible geometric networks in which spatial errors emerge from nonlinear parameter interactions. A central challenge in nanoscale fluorescence imaging is the linkage error—the offset between a probe and its target—originating from antibody flexibility and structural heterogeneity. In this work, we establish a statistical physics framework that combines Monte Carlo simulations, information-theoretic analysis, and nonlinear regression modeling to quantitatively dissect error propagation in different molecular labeling architectures. We demonstrate that linkage error is governed by emergent synergistic regimes: length–angle co-optimization in compact single-chain nanobodies, angular equilibrium in Y-shaped IgGs, and rotational compensation in multi-level secondary complexes. These results reveal that error formation is not additive but arises from nonlinear cooperativity among geometric degrees of freedom, a hallmark of complex systems. Our framework highlights how coupling between structural parameters generates conformational cascades that amplify or suppress error, providing a generalizable approach for analyzing error dynamics in flexible molecular complexes. Beyond immunolabeling, this methodology establishes a bridge between statistical mechanics, information theory, and nanoscale biophysics, offering transferable principles for the design of high-precision probes in complex fluctuating systems.
{"title":"Synergistic regimes of geometric constraints in flexible biomolecular systems: A Monte Carlo and information-theoretic analysis of linkage errors","authors":"Xinyi Fu , Jing Wang , Changgui Gu , Huihui Zou","doi":"10.1016/j.cjph.2025.11.004","DOIUrl":"10.1016/j.cjph.2025.11.004","url":null,"abstract":"<div><div>Complex biomolecular labeling systems can be regarded as flexible geometric networks in which spatial errors emerge from nonlinear parameter interactions. A central challenge in nanoscale fluorescence imaging is the linkage error—the offset between a probe and its target—originating from antibody flexibility and structural heterogeneity. In this work, we establish a statistical physics framework that combines Monte Carlo simulations, information-theoretic analysis, and nonlinear regression modeling to quantitatively dissect error propagation in different molecular labeling architectures. We demonstrate that linkage error is governed by emergent synergistic regimes: length–angle co-optimization in compact single-chain nanobodies, angular equilibrium in Y-shaped IgGs, and rotational compensation in multi-level secondary complexes. These results reveal that error formation is not additive but arises from nonlinear cooperativity among geometric degrees of freedom, a hallmark of complex systems. Our framework highlights how coupling between structural parameters generates conformational cascades that amplify or suppress error, providing a generalizable approach for analyzing error dynamics in flexible molecular complexes. Beyond immunolabeling, this methodology establishes a bridge between statistical mechanics, information theory, and nanoscale biophysics, offering transferable principles for the design of high-precision probes in complex fluctuating systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 914-926"},"PeriodicalIF":4.6,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575901","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}
Pub Date : 2025-11-05DOI: 10.1016/j.cjph.2025.11.003
Xiaolin Cai , Zhixiang Pan , Rui Li , Xuefeng Yang , Junke Yuan , Zexi Xu , Yu Jia
Two-dimensional (2D) van der Waals heterostructures (vdWHs) have garnered significant attention due to their potential to extend the applications of single 2D materials. In this study, we use first-principles calculations to design a novel ZnI₂/In₂Se₃ vdWH that combines semiconducting and ferroelectric properties via precise interfacial control. Our results reveal that the reversal of the polarization direction in In2Se3 acts as a non-volatile switch, enabling a reversible transition between type-I and type-II band alignments in the heterostructure with the bandgaps of 1.56 and 1.43 eV, respectively. The ZnI₂/In₂Se₃ vdWH shows enhanced optical absorption with the visible and ultraviolet light absorption coefficients reaching 6% and 27%, respectively, substantially higher than those of the individual monolayers. Furthermore, the type-II ZnI₂/In₂Se₃ vdWH exhibits efficient interlayer charge transfer following a Z-scheme mechanism, promising for photocatalytic hydrogen production through water splitting. Additionally, the electronic structure of ZnI₂/In₂Se₃ vdWH is highly tunable under external electric field and strain, facilitating the reversible switching between type-I and type-II band alignments as well as between direct and indirect bandgap semiconductors. This tunability is crucial for the development of multifunctional optoelectronic devices. Our designed ZnI₂/In₂Se₃ vdWH presents significant opportunities for nano-optoelectronic device integration.
{"title":"Switchable Z-scheme charge transfer and tunable electronic properties in ZnI₂/In₂Se₃ bilayer ferroelectric heterostructure","authors":"Xiaolin Cai , Zhixiang Pan , Rui Li , Xuefeng Yang , Junke Yuan , Zexi Xu , Yu Jia","doi":"10.1016/j.cjph.2025.11.003","DOIUrl":"10.1016/j.cjph.2025.11.003","url":null,"abstract":"<div><div>Two-dimensional (2D) van der Waals heterostructures (vdWHs) have garnered significant attention due to their potential to extend the applications of single 2D materials. In this study, we use first-principles calculations to design a novel ZnI₂/In₂Se₃ vdWH that combines semiconducting and ferroelectric properties via precise interfacial control. Our results reveal that the reversal of the polarization direction in In<sub>2</sub>Se<sub>3</sub> acts as a non-volatile switch, enabling a reversible transition between type-I and type-II band alignments in the heterostructure with the bandgaps of 1.56 and 1.43 eV, respectively. The ZnI₂/In₂Se₃ vdWH shows enhanced optical absorption with the visible and ultraviolet light absorption coefficients reaching 6% and 27%, respectively, substantially higher than those of the individual monolayers. Furthermore, the type-II ZnI₂/In₂Se₃ vdWH exhibits efficient interlayer charge transfer following a Z-scheme mechanism, promising for photocatalytic hydrogen production through water splitting. Additionally, the electronic structure of ZnI₂/In₂Se₃ vdWH is highly tunable under external electric field and strain, facilitating the reversible switching between type-I and type-II band alignments as well as between direct and indirect bandgap semiconductors. This tunability is crucial for the development of multifunctional optoelectronic devices. Our designed ZnI₂/In₂Se₃ vdWH presents significant opportunities for nano-optoelectronic device integration.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 850-860"},"PeriodicalIF":4.6,"publicationDate":"2025-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516994","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}
Pub Date : 2025-11-05DOI: 10.1016/j.cjph.2025.11.001
Felipe Tejo , Nicolas Vidal-Silva
A comprehensive exploration of spin-wave modes excited in ultrathin square nanodots hosting an antivortex texture was performed by means of micromagnetic simulations. By comparing the emerging spin-wave modes with the well-known results for magnetic vortices, the resulting modes in antivortices are categorized as breathing or azimuthal depending on whether the applied magnetic pulse is in-plane or out-of-plane. Within the studied frequency range, we observe the presence of two azimuthal modes, namely a gyrotropic mode and a higher-energy one. Under out-of-plane excitation-unlike in vortices-we observe two different breathing modes characterized by the periodic expansion and contraction of the antivortex core, which differ in the amplitude of these oscillations. Our results could contribute to the design of spintronic devices that employ vortex or antivortex structures as sources of spin-wave signals or magnonic-based logic circuits.
{"title":"Spin wave modes of antivortices hosted in square ultrathin nanodots","authors":"Felipe Tejo , Nicolas Vidal-Silva","doi":"10.1016/j.cjph.2025.11.001","DOIUrl":"10.1016/j.cjph.2025.11.001","url":null,"abstract":"<div><div>A comprehensive exploration of spin-wave modes excited in ultrathin square nanodots hosting an antivortex texture was performed by means of micromagnetic simulations. By comparing the emerging spin-wave modes with the well-known results for magnetic vortices, the resulting modes in antivortices are categorized as breathing or azimuthal depending on whether the applied magnetic pulse is in-plane or out-of-plane. Within the studied frequency range, we observe the presence of two azimuthal modes, namely a gyrotropic mode and a higher-energy one. Under out-of-plane excitation-unlike in vortices-we observe two different breathing modes characterized by the periodic expansion and contraction of the antivortex core, which differ in the amplitude of these oscillations. Our results could contribute to the design of spintronic devices that employ vortex or antivortex structures as sources of spin-wave signals or magnonic-based logic circuits.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 953-963"},"PeriodicalIF":4.6,"publicationDate":"2025-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145575899","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}
Pub Date : 2025-11-03DOI: 10.1016/j.cjph.2025.10.032
Hajar Belmahi , Amin Mohamed Rbah
Motivated by string theory scenarios, we study the optical aspect of AdS black holes in Einstein-Maxwell-dilaton theory. Concretely, we investigate and examine the shadows and the deflection angle of light rays by such cosmological black holes. Regarding the shadows, we first deal with the non-rotating solutions. As expected, we obtain perfect circular shadows where their sizes are controlled by the involved parameters including the charge and the cosmological constant. Combining the Newman-Janis formalism and the Hamilton-Jacobi algorithm, we approach the rotating black hole shadows using one dimensional real curves. Among others, we observe that the size and the shape of the shadows depend on certain parameters such as the rotation parameter. To make contact with the Event Horizon Telescope observational data, we show that certain constraints should be imposed on such parameters. Then, we study the behaviors of the light rays near such cosmological black holes by computing the deflection angle in terms of the Einstein-Maxwell-dilaton theory parameters. Specifically, we reveal that the effect of the cosmological constant on the deflection angle depends on the coupling between the black hole parameters. Introducing the rotation parameter, we observe that this effect becomes similar to that of the cosmological constant in ordinary AdS black holes.
{"title":"Optical aspect of cosmological black holes in Einstein-Maxwell-dilaton theory","authors":"Hajar Belmahi , Amin Mohamed Rbah","doi":"10.1016/j.cjph.2025.10.032","DOIUrl":"10.1016/j.cjph.2025.10.032","url":null,"abstract":"<div><div>Motivated by string theory scenarios, we study the optical aspect of AdS black holes in Einstein-Maxwell-dilaton theory. Concretely, we investigate and examine the shadows and the deflection angle of light rays by such cosmological black holes. Regarding the shadows, we first deal with the non-rotating solutions. As expected, we obtain perfect circular shadows where their sizes are controlled by the involved parameters including the charge and the cosmological constant. Combining the Newman-Janis formalism and the Hamilton-Jacobi algorithm, we approach the rotating black hole shadows using one dimensional real curves. Among others, we observe that the size and the shape of the shadows depend on certain parameters such as the rotation parameter. To make contact with the Event Horizon Telescope observational data, we show that certain constraints should be imposed on such parameters. Then, we study the behaviors of the light rays near such cosmological black holes by computing the deflection angle in terms of the Einstein-Maxwell-dilaton theory parameters. Specifically, we reveal that the effect of the cosmological constant on the deflection angle depends on the coupling between the black hole parameters. Introducing the rotation parameter, we observe that this effect becomes similar to that of the cosmological constant in ordinary AdS black holes.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"101 ","pages":"Pages 33-46"},"PeriodicalIF":4.6,"publicationDate":"2025-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186881","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}
Pub Date : 2025-11-02DOI: 10.1016/j.cjph.2025.10.021
Bing Qiu , Hua Kuang
Compared with real-time tracking of the vehicles movement, acquiring global traffic information incurs lower communication costs and exhibits superior anti-interference performance. To evaluate the comprehensive performance of the global interaction, a novel car-following model for Connected Autonomous Vehicles (CAVs) is proposed, which integrates the coupling effects of global interaction (i.e., the system velocity difference) and local interaction (i.e., multiple nearest-neighbor velocity differences). Theoretical analysis and numerical simulations demonstrate the traffic flow performance under various proportional combinations of the two interactions from multiple perspectives (e.g., stability, additional energy consumption, driving smoothness, etc.). A new metric, “average acceleration power”, is introduced to quantify the smoothness of the driving process. The results show that the impact of the system velocity difference on stability is comparable to that of the nearest-neighbor velocity difference, while the resulting driving smoothness is superior to that of the multiple nearest-neighbor velocity differences in the unsteady flow, therefore leads to a reduction in additional energy consumption and an enhancement in the range of CAVs. Based on this, a flexible driving strategy is constructed, which may optimize energy consumption under different traffic conditions by leveraging the complementary advantages of global interaction factors and local interaction factors.
{"title":"Energy consumption investigation for an extended car-following model incorporating the effects of global and local interaction","authors":"Bing Qiu , Hua Kuang","doi":"10.1016/j.cjph.2025.10.021","DOIUrl":"10.1016/j.cjph.2025.10.021","url":null,"abstract":"<div><div>Compared with real-time tracking of the vehicles movement, acquiring global traffic information incurs lower communication costs and exhibits superior anti-interference performance. To evaluate the comprehensive performance of the global interaction, a novel car-following model for Connected Autonomous Vehicles (CAVs) is proposed, which integrates the coupling effects of global interaction (i.e., the system velocity difference) and local interaction (i.e., multiple nearest-neighbor velocity differences). Theoretical analysis and numerical simulations demonstrate the traffic flow performance under various proportional combinations of the two interactions from multiple perspectives (e.g., stability, additional energy consumption, driving smoothness, etc.). A new metric, “average acceleration power”, is introduced to quantify the smoothness of the driving process. The results show that the impact of the system velocity difference on stability is comparable to that of the nearest-neighbor velocity difference, while the resulting driving smoothness is superior to that of the multiple nearest-neighbor velocity differences in the unsteady flow, therefore leads to a reduction in additional energy consumption and an enhancement in the range of CAVs. Based on this, a flexible driving strategy is constructed, which may optimize energy consumption under different traffic conditions by leveraging the complementary advantages of global interaction factors and local interaction factors.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 793-809"},"PeriodicalIF":4.6,"publicationDate":"2025-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462843","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}
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