Chinese Journal of Physics最新文献

{"title":"Ghost surface polaritons in Ca-intercalated α-vanadium pentoxide","authors":"Song Bai,&nbsp;Yubo Li,&nbsp;Haoyuan Song,&nbsp;Qiang Zhang,&nbsp;Shufang Fu,&nbsp;Xuanzhang Wang","doi":"10.1016/j.cjph.2025.06.010","DOIUrl":"10.1016/j.cjph.2025.06.010","url":null,"abstract":"<div><div>We have examined the conditions required for the existence of ghost surface polaritons (GSPs) with oscillations and attenuation properties in a low-symmetrical α-V₂O₅ crystal in the three special geometries, where the two principal axes are situated off the surface of the crystal and the other is parallel to the surface. It is discovered that GSPs, which are made up of two coherent evanescent branch waves, can be observed in the three reststrahlen frequency bands once an angle exists between the crystal axis and the coordinate axis. The underlying mechanism governing the modulation of GSPs propagation characteristics has been explored following the intercalation of calcium (Ca) atoms into α-V₂O₅ crystals. The investigation demonstrates that Ca-intercalation can dramatically alter the main characteristics of GSPs, particularly in terms of the frequency response behavior and propagation modes. As proven by attenuated total reflection spectra, the GSPs produced in α-V₂O₅ or α'-(Ca)V₂O₅ crystal can be detectable by selecting the appropriate observation conditions, such as the gap between the prism and the crystal. The findings provide innovative insights for developing advanced optoelectronic materials and devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 716-731"},"PeriodicalIF":4.6,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321496","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}

{"title":"Nonlinear plasma wave excitation in cylindrical semiconductor waveguides","authors":"Amir Sohail ,&nbsp;A. Rasheed ,&nbsp;F. Areeb ,&nbsp;B. Ramzan ,&nbsp;M. Jamil ,&nbsp;Shahid Idrees ,&nbsp;Yuanyong Deng","doi":"10.1016/j.cjph.2025.05.023","DOIUrl":"10.1016/j.cjph.2025.05.023","url":null,"abstract":"<div><div>This paper investigates the nonlinear excitation of plasma waves due to the interaction between an electron acoustic pump wave and a hole acoustic sideband wave in cylindrical semiconductor waveguides using nonlinear theory. The coupling between these waves leads to the generation of a beat acoustic wave, forming a three-wave interaction system. Quantum effects like Fermi degenerate pressure, exchange–correlation, and Bohm potentials, which play a critical role in modulating the wave dynamics, are incorporated. Using the Quantum Hydrodynamic Model, we derive and analyze the dispersion relations of these waves and the growth rates of beat waves under phase-matching conditions. Numerical results show that the nonlinearity emerges through ponderomotive forces, leading to significant amplification of the beat wave. The growth rate evolution is examined under the influence of temperature, electron density, and wave vector that reveals the enhanced wave coupling and energy transfer by lower temperatures, higher electron densities due to quantum effects, as well as shorter wavelengths and higher potential pump acoustic waves as optimizing conditions. These findings have potential applications in semiconductor device design, where controlled nonlinear wave interactions are essential for optimizing performance.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 678-689"},"PeriodicalIF":4.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306413","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}

{"title":"Anomalous persistent current in a 1D dimerized ring with aperiodic site potential: Non-interacting and interacting cases","authors":"Souvik Roy ,&nbsp;Santanu K. Maiti ,&nbsp;David Laroze","doi":"10.1016/j.cjph.2025.05.024","DOIUrl":"10.1016/j.cjph.2025.05.024","url":null,"abstract":"<div><div>In this work, we investigate the magnetic response by examining flux-driven circular currents in a Su–Schrieffer–Heeger (SSH) tight-binding (TB) ring threaded by an Aharonov–Bohm (AB) flux, <span><math><mi>ϕ</mi></math></span>. We consider both non-interacting and interacting electrons, where site energies are modulated by a slowly varying cosine form. Repulsive electron–electron interaction is incorporated through an on-site Hubbard term, and we analyze the system using the Hartree–Fock (HF) mean-field (MF) approximation. We discuss the characteristics of flux-driven circular currents to aperiodic potentials, dimerized hopping integrals, and Hubbard interactions. For the chosen aperiodic potential, both the strength and configuration play a crucial role, and we explore these aspects in depth. Interestingly, we observe a counterintuitive delocalizing effect as the aperiodic potential increases, unlike in conventional disordered rings. The effects of system size, filling factor, the presence of circular spin current, and the accuracy of MF results are also discussed. Finally, we provide a brief description of possible experimental realizations of our chosen quantum system. This investigation can be extended to explore additional properties in various loop substructures, promising further insights.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 542-558"},"PeriodicalIF":4.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263451","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}

{"title":"Efficiency optimization of micro-swimmers in viscoelastic bio-fluids within complex cervical environments","authors":"Zeeshan Asghar ,&nbsp;Khalil Ur Rehman ,&nbsp;Wasfi Shatanawi ,&nbsp;Muhammad Waris Saeed Khan","doi":"10.1016/j.cjph.2025.06.003","DOIUrl":"10.1016/j.cjph.2025.06.003","url":null,"abstract":"<div><div>Biological fluids often harbor motile organisms, making the study of micro-swimming mechanisms within these environments critical for advancing medical applications. This research aims to deepen our understanding of how micro-swimmers interact with their surrounding fluids. Addressing the complexities of these interactions requires an interdisciplinary approach that integrates biology, mathematics, and physics. In this study, we utilize the classical Navier-Stokes equations to model the rheological behavior of mucus, focusing on its representation as a Finitely Extensible Nonlinear Elastic Peterlin (FENE-P) fluid. We analyze three distinct scenarios within bounded channels: passive, simple active, and complex active configurations, all filled with FENE-P mucus. The propulsion in these micro-channels is driven by the movement of spermatozoa and the dynamics of the channel walls, underpinned by key assumptions such as creeping flow and lubrication theory. Conservation of momentum yields a second-order differential equation, which we solve numerically to determine the propulsion speed under specific conditions. Our findings outline the conditions that optimize swimming efficiency, offering valuable insights into the design of artificial micro-swimmers with customizable speeds. These results hold significant potential for applications in biomedical engineering and the development of targeted delivery systems in healthcare.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 664-677"},"PeriodicalIF":4.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144288911","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}

{"title":"Atom-number probing for deep degeneracy determination of 6Li atoms in an optical dipole trap","authors":"Hong-Fang Song ,&nbsp;Feng Lai ,&nbsp;Ke Li ,&nbsp;Fuqiang Wang","doi":"10.1016/j.cjph.2025.05.025","DOIUrl":"10.1016/j.cjph.2025.05.025","url":null,"abstract":"<div><div>We produce a deeply degenerate Fermi gas of ⁶Li atoms via evaporative cooling in an optical dipole trap (ODT). The deep degeneracy is determined by observing total population saturation at the theoretical boundary, verified with finite-temperature fitting and <em>in situ</em> absorption imaging. The Pauli blocking at <span><math><mrow><mi>T</mi><mo>≈</mo><mn>0</mn><mo>.</mo><mn>3</mn><msub><mrow><mi>T</mi></mrow><mrow><mi>F</mi></mrow></msub></mrow></math></span> is circumvented through atom spilling by continuously reducing the ODT depth below <span><math><mrow><mn>1</mn><mo>.</mo><mn>2</mn><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub></mrow></math></span>, leading to the gas temperature below <span><math><mrow><mn>0</mn><mo>.</mo><mn>1</mn><msub><mrow><mi>T</mi></mrow><mrow><mi>F</mi></mrow></msub></mrow></math></span>. The many-body mean field parameter <span><math><mrow><mi>β</mi><mo>=</mo><mo>−</mo><mn>0</mn><mo>.</mo><mn>63</mn></mrow></math></span> at zero temperature, extrapolated from in-trap Thomas–Fermi cloud sizes, yields a corrected temperature, <span><math><mrow><mi>T</mi><mo>/</mo><msub><mrow><mi>T</mi></mrow><mrow><mi>F</mi></mrow></msub><mo>&lt;</mo><mn>0</mn><mo>.</mo><mn>1</mn></mrow></math></span>. Finally, a magnetic field sweep across the Feshbach resonance point (834 G) converts the cold Fermi gas into a molecular Bose–Einstein condensate of paired ⁶Li atoms, providing conclusive evidence of deep quantum degeneracy.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 520-527"},"PeriodicalIF":4.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254476","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}

{"title":"Influence of three parameters on decoupled charged compact stars generated by dark matter and their predicted radii in f(R,T) gravity theory","authors":"S.K. Maurya ,&nbsp;Fadhila Al Khayari ,&nbsp;Asifa Ashraf ,&nbsp;M.K. Jasim ,&nbsp;Smitha T.T. ,&nbsp;Phongpichit Channuie","doi":"10.1016/j.cjph.2025.05.019","DOIUrl":"10.1016/j.cjph.2025.05.019","url":null,"abstract":"<div><div>In the context of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> gravity theory we have obtained an exact non-singular solution to the field equations for the anisotropic charged stellar system. The method of minimal geometrical deformation (MGD) with regard to the gravitational decoupling approach is employed to reduce the field equations into two sets of equations governed by the seed system and the new source system. An isotropic charged fluid configuration with modified Durgapal–Fuloria potential as a metric ansatz is considered for the seed system whereas density profile of Pseudo-Isothermal dark matter (PI-DM) is taken into account to mimic a component of the new source system. The anisotropy feature that essentially arises in the effective system is one of the important consequences of the gravitational decoupling approach. With this approach we get the solution to gravitationally decoupled field equations which describes the physical characteristics of an effective anisotropic and charged system. The effective system is found to be stable with regard to Herrera’s cracking concept, adiabatic condition, and Harrison–Zeldovich–Novikov criteria. The influence of the MGD parameter, coupling constant, and dark matter density parameter on the physical features and stability of the effective system have been analyzed and shown graphically. The mass–radius relation of the effective system is inspected in connection to the observational constraint of the massive stars such as pulsars and massive secondary companions involved in gravitational wave events. The maximum mass of the star is apparently constrained with the increasing values of the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span>-gravity coupling constant, MGD parameter, DM density parameter, and charge. Enabling all the set of parameters the range of predicted radii of the observed massive stars was found to be 9.77 km–12.00 km.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 621-642"},"PeriodicalIF":4.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279609","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}

{"title":"Ground states of the rotating SU(3) spin–orbit coupled spin 1 Bose–Einstein condensate in a two-dimensional harmonic trap","authors":"Ying-feng Gao,&nbsp;Yong-Kai Liu","doi":"10.1016/j.cjph.2025.05.020","DOIUrl":"10.1016/j.cjph.2025.05.020","url":null,"abstract":"<div><div>We investigated the effects of a novel SU(3) spin–orbit coupling (SOC) and rotation frequency on spin-1 Bose–Einstein condensates (BECs) in a two-dimensional harmonic trap. The interaction, spin–orbit coupling, and rotation frequency provide various phase diagrams for the ground state of BECs in an innovative artificial gauge field. In the antiferromagnetic state, the system underwent three novel phase transitions from the peculiar petal phase to the oblique fringe phase and then to the fringe lattice phase as the spin–orbit coupling increased. There are four types of phases in the ferromagnetic state: mixed petal-stripe phase, transverse stripe phase, reticular lattice phase, and transverse stripe lattice phase. Under the influence of the rotation frequency, BECs with weak spin–orbit coupling exhibit more vortices, such as triangular honeycomb, U-shaped vortex, and hexagonal honeycomb lattices. In the case of strong spin–orbit coupling, a square lattice forms and an annular vortex chain emerges with increasing rotation frequency.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 511-519"},"PeriodicalIF":4.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254475","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}

{"title":"The evolution and optimization control of collective decision-making with opinion preferences on social networks","authors":"Chunhua Hu ,&nbsp;Xiaozhen Shu","doi":"10.1016/j.cjph.2025.06.002","DOIUrl":"10.1016/j.cjph.2025.06.002","url":null,"abstract":"<div><div>The kinetic theory is employed to investigate the influence of opinion preferences and user connectivity in social networks on collective decision-making and its optimization control. Collective decision-making takes place not only through traditional offline approaches but also within social networks. To examine how collective decisions evolve in these networks, we establish a joint density function for decision-connectivity and develop two Boltzmann models, one incorporating a control term. Our model accounts for the overall connectivity distribution among individuals and their opinion preferences. In addition, we assume that each agent’s connectivity determines the credibility of the opinions they present. Using the kinetic model, we study the evolution of average decisions and reveal how opinion preferences and connectivity within social networks influence collective decision-making.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 603-620"},"PeriodicalIF":4.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272483","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}

{"title":"Inverse scattering transform for the fourth-order nonlinear Schrödinger equation with fully asymmetric non-zero boundary conditions","authors":"Peng-Fei Han ,&nbsp;Kun Zhu ,&nbsp;Feng Zhang ,&nbsp;Wen-Xiu Ma ,&nbsp;Yi Zhang","doi":"10.1016/j.cjph.2025.05.021","DOIUrl":"10.1016/j.cjph.2025.05.021","url":null,"abstract":"<div><div>The inverse scattering transform is utilized to address the initial-value problem for the fourth-order nonlinear Schrödinger equation characterized by fully asymmetric non-zero boundary conditions. This work considers the fully asymmetric scenario for both asymptotic amplitudes and phases. The direct problem demonstrates the establishment of the corresponding analytic properties of eigenfunctions and scattering data. The inverse scattering problem is approached using both (left and right) Marchenko integral equations and is also formulated as the Riemann–Hilbert problem on a single sheet of the scattering variable. The temporal evolution of the scattering coefficients is subsequently deduced, revealing that in contrast to solutions with uniform amplitudes, both reflection and transmission coefficients exhibit a nontrivial time dependency here. The findings of this paper are expected to be pivotal for exploring the long-time asymptotic behavior of the fourth-order nonlinear Schrödinger solutions with significant boundary conditions.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 577-602"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263450","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}

{"title":"Mathematical modeling and analysis of the pulsating flow of the cerebrospinal fluid","authors":"Helan Princey C.,&nbsp;David Maxim Gururaj A.","doi":"10.1016/j.cjph.2025.05.018","DOIUrl":"10.1016/j.cjph.2025.05.018","url":null,"abstract":"<div><div>This study presents a mathematical model analyzing the cerebrospinal fluid (CSF) flow velocity, wall shear stress, and flow rate within the subarachnoid space, treating it as a porous medium in a channel. Understanding CSF dynamics is essential for neurological health, particularly in drug delivery, hydrocephalus, and neurodegenerative diseases. The perturbation technique is applied to transform the non-linear partial differential equation into an ordinary differential equation, which is then solved analytically. The findings reveal that the no-slip boundary condition and laminar pressure-driven flow in the constrained spaces lead to a parabolic velocity profile. The results indicate that the CSF flow velocity increases with increasing Darcy number and decreases with frequency, emphasizing the role of the porous resistance and pulsatile effects. A reduction in the flow rate at higher frequencies leads to impaired CSF circulation, directly contributing to inadequate waste clearance from the brain, a factor known to drive conditions such as Alzheimer’s disease and other neurodegenerative disorders. Furthermore, decreased shear stress with a higher Darcy number has significant clinical consequences, as excessive mechanical forces on the brain and spinal cord structures accelerate the progression of disorders like syringomyelia and traumatic brain injuries. These insights provide a critical foundation for developing targeted therapies for CSF-related abnormalities and optimizing treatments, such as intrathecal drug delivery.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 499-510"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240124","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}