Chinese Journal of Physics最新文献

{"title":"Pressure induced high-Tc superconductivity in ternary SrBH8 with distinctive B–H motif and complex hydrogen bonding patterns","authors":"Fulong Yang ,&nbsp;Chuanzhao Zhang ,&nbsp;Yanqi Wang ,&nbsp;Jinquan Zhang ,&nbsp;Panlong Kong ,&nbsp;Song Li ,&nbsp;Fang Chen ,&nbsp;Yuanyuan Jin ,&nbsp;Meng Ju ,&nbsp;Kaixiong Gao","doi":"10.1016/j.cjph.2025.02.044","DOIUrl":"10.1016/j.cjph.2025.02.044","url":null,"abstract":"<div><div>Inspired by the recent discovery of near or even above room-temperature superconductors in the pressurized H<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>S, CaH<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span>, YH<span><math><msub><mrow></mrow><mrow><mn>9</mn></mrow></msub></math></span>, LaH<span><math><msub><mrow></mrow><mrow><mn>10</mn></mrow></msub></math></span>, and CeH<span><math><msub><mrow></mrow><mrow><mn>18</mn></mrow></msub></math></span>, H-rich hydrides under high pressure are believed to be the potential candidates for high-temperature superconductors. Unfortunately, the tremendous pressures needed to stabilize these structures exceptionally restrict their practical applications. An effective strategy to reduce the external pressure is to incorporate the light boron atom into established binary hydrides to construct binary B–H textures with the B–H covalent bonds. Guided by this hypothesis, crystal structures and superconductivity of ternary Sr-B-H system under pressure were theoretically delved into. Notably, we successfully identify a stable SrBH₈ under 137–300 GPa and the triclinic <em>P</em>-1-SrBH₈ phase can be retained to at least 137 GPa during decompression. Subsequently, trigonal <em>R</em>-3<em>m</em>-SrBH₈ becomes more stable than <em>P</em>-1-SrBH₈ at 212 GPa. Intriguingly, <em>P</em>-1-SrBH₈ consists of the BH₄ framework and H₂ molecular dimer while <em>R</em>-3<em>m</em>-SrBH₈ encompasses the BH₆ motif and H₄ unit. Namely, despite the H atom bonding mode bonded to B atom in BH₄ and BH₆ units in both phases is same with robust B–H covalent bond, the remanent H atom bonding modes are distant, which denotes the H₂ unit with the H2–H2 covalent bond and weak H1–H2 covalent bond in the H4 texture emerge in <em>P</em>-1-SrBH₈ and <em>R</em><span><math><mrow><mo>−</mo><mn>3</mn></mrow></math></span><em>m</em>-SrBH₈, respectively. Both crystals are predicted to be promising superconductors with the estimated <em>T</em> <span><math><msub><mrow></mrow><mrow><mi>c</mi></mrow></msub></math></span>s of 103 K (<em>P</em>-1-SrBH₈, 137 GPa) and 141 K (<em>R</em><span><math><mrow><mo>−</mo><mn>3</mn></mrow></math></span><em>m</em>-SrBH₈, 300 GPa), which are separately attributed to the vibration of the B–H bond in BH₄ framework, and a hybrid vibration of the B–H bond in BH₆ building and the H1–H2 bond in H₄ unit. This work provides an effective strategy for the design of the low-pressure stabilized high-temperature hydride superconductors, which is destined to widen the explorations on the particular B–H skeleton and abundant H bonding mode in the H-rich ternary borohydrides.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 600-614"},"PeriodicalIF":4.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760379","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":"Blowing and multiple slip effects on bio-nano-convection flow in porous media within the gap of a rotating cone-disc system","authors":"M.K. Das ,&nbsp;M.J. Uddin ,&nbsp;T.A. Bég ,&nbsp;O. Anwar Bég ,&nbsp;Henry J. Leonard","doi":"10.1016/j.cjph.2025.03.005","DOIUrl":"10.1016/j.cjph.2025.03.005","url":null,"abstract":"<div><div>Fluid flow inside the gap between a rotating cone and a disc has significant applications in bio-chemical engineering, biotechnological (biofuel) processing and materials science. In these areas, engineers are continuously exploring the combination of nanofluids, bioconvection mechanisms and other features (e.g. porous filtration materials) to optimize (flow) performance. Motivated by these applications, the present article describes a mathematical model for simulating nanofluid transport with bioconvection micro-organisms inside the conical gap between a rotating cone-disc system containing an incompressible, sparse Darcian porous medium. Buongiorno's two-component nanoscale model is deployed for the nanofluid and Kuznetsov gyrotactic bioconvection model utilized for the micro-organism self-propulsion. The mathematical model also features multiple walls slip effects and Stefan blowing boundary conditions. By employing coordinate transformations derived via group theory methods, the governing transport equations are transformed into a set of similarity equations with coupled boundary conditions. These transformed similarity equations are then solved numerically with an efficient finite difference method available in the MATLAB solver “bvp4c”. Some of the results reported are verified with special cases from the literature. Extensive graphical visualization of the key flow characteristics is included. Four physical cases are considered, namely the <em>static disc with rotating cone, static cone with rotating disc, disc-cone in co-rotation, and disc-cone in counter rotation</em>. Smaller gap angles are observed to intensify heat, NPVF transport rates and wall motile microorganism flux rates. Axial velocity attains the highest magnitude with large centrifugal force generated by the rotation of cone. Thermal slip induces a decrement in fluid temperature and associated thermal boundary layer thickness. Greater Stefan blowing leads to an increment in velocity components, fluid temperature, nanoparticle concentration (volume fraction) and gyrotactic microorganism concentration (density number) for all 4 cases examined.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 685-713"},"PeriodicalIF":4.6,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777443","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":"Onset of magneto convection of Casson fluid in an inclined porous layer using local thermal non-equilibrium model: A linear and nonlinear analyses","authors":"Bhagya Mathapati,&nbsp;Ravi Ragoju,&nbsp;G. Shiva Kumar Reddy","doi":"10.1016/j.cjph.2025.02.042","DOIUrl":"10.1016/j.cjph.2025.02.042","url":null,"abstract":"<div><div>The Casson fluids, with their distinct rheological properties, are prevalent in biological, industrial, and material processing systems and the local thermal non-equilibrium (LTNE) model realistically captures heat transfer in porous media by considering separate temperature fields for fluid and solid phases. Incorporating inclination and magnetic effects adds critical complexity and control, making this study essential for optimizing heat and mass transfer in systems. The LTNE model has been used to examine the magneto convection of a Casson fluid in an inclined porous medium under the influence of a magnetic field. Darcy’s law is applied, and we assume the validity of the Oberbeck–Boussinesq approximation. The onset of convection is investigated by two methods: the linear instability analysis and the nonlinear stability analysis. The linear instability analysis is conducted using the normal mode method. The nonlinear stability analysis is studied by utilizing the energy stability method. The resulting eigenvalue problem is solved numerically through the bvp4c routine in MATLAB R2023a. The impact of essential parameters, including the Hartmann number (<span><math><mrow><mi>H</mi><msup><mrow><mi>a</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>), the inter-phase heat transfer parameter (<span><math><mi>H</mi></math></span>), the porosity-modified conductivity ratio (<span><math><mi>τ</mi></math></span>), the Casson fluid parameter (<span><math><mi>β</mi></math></span>), and an inclination angle (<span><math><mi>γ</mi></math></span>), is thoroughly investigated. A comparison of linear instability and nonlinear stability theories reveals a notable difference in the critical Rayleigh numbers (<span><math><mrow><mi>R</mi><msub><mrow><mi>a</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span>), suggesting the potential existence of a subcritical instability region. The major result of the study indicates that an increase in <span><math><mrow><mi>H</mi><msup><mrow><mi>a</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>, <span><math><mi>H</mi></math></span>, and <span><math><mi>γ</mi></math></span> leads to significant stabilization of the system, whereas an increase in <span><math><mi>β</mi></math></span> tends to destabilize it. Moreover, the disappearance of transverse rolls is strongly influenced by the parameter <span><math><mi>β</mi></math></span>, making it a critical factor in determining the stability of the system.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 306-319"},"PeriodicalIF":4.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644387","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":"Thermal convection instability with throughflow in an Oldroyd-B fluid saturated bidispersive porous layer","authors":"Beinan Jia ,&nbsp;Quansheng Liu ,&nbsp;Yongjun Jian","doi":"10.1016/j.cjph.2025.03.004","DOIUrl":"10.1016/j.cjph.2025.03.004","url":null,"abstract":"<div><div>This research explores the thermal convection instability with throughflow in a bidispersive porous layer saturated with Oldroyd-B fluid, using a modified Darcy-Oldroyd model. The study identifies both stationary and oscillatory modes through linear stability analysis. The eigenspectrums of eigenvalues demonstrate that two modes of instability are present in the Oldroyd-B fluid model, whereas only the stationary mode is observed in the Newtonian fluid model. Furthermore, the throughflow significantly influences the instability modes. When Péclet number <em>Pe</em> is less than 2, instability manifests in two modes: stationary and oscillatory. However, as <em>Pe</em> exceeds 2, only the oscillatory mode is observed. Moreover, this critical value remains unaffected by variations in other parameters. The neutral stability curve reveals that instability is suppressed as the throughflow increases. When both the oscillatory and stationary modes occur simultaneously (<em>Pe</em> &lt; 2), the neutral stability curve exhibits two minima, each corresponding to one of the modes. Additionally, an increase in relaxation time magnifies instability, whereas an increment in the permeability ratio (<em>K_r</em>) suppresses instability.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 573-584"},"PeriodicalIF":4.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746878","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":"A novel semi-analytical meshless method for Navier-Stokes equations arising in fractured rock masses","authors":"Yingzi Jiang,&nbsp;Fuzhang Wang","doi":"10.1016/j.cjph.2025.03.007","DOIUrl":"10.1016/j.cjph.2025.03.007","url":null,"abstract":"<div><div>The seepage problem of oil-water two-phase flow in fractured rock masses has attracted great attention in engineering problems such as nuclear energy waste discharge. In this paper, we intend to propose a novel semi-analytical meshless method to simulate the Navier-Stokes equations arising in fractured rock masses. The semi-analytical meshless method is based on the newly-constructed Gaussian-type spatiotemporal radial basis functions. This method is a one-step solution method for time-dependent problems. Numerical examples show that the proposed semi-analytical meshless method can compete with the other methods in terms of solution accuracy as well as CPU time.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 1069-1077"},"PeriodicalIF":4.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877062","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":"Effects of external magnetic field and DM x-interaction on Fisher and Wigner–Yanase information correlations of thermal Heisenberg XYZ states","authors":"Fahad Aljuaydi ,&nbsp;S.N. Almutairi ,&nbsp;A.-B.A. Mohamed","doi":"10.1016/j.cjph.2025.02.037","DOIUrl":"10.1016/j.cjph.2025.02.037","url":null,"abstract":"<div><div>This study investigates the influence of temperature, the Dzyaloshinsky–Moriya (spin–orbit) interaction and an external inhomogeneous magnetic field in the <span><math><mi>x</mi></math></span>-direction on the thermal quantum information resources in general spin–spin Heisenberg XYZ states, focusing on local quantum Fisher information (LQFI), local quantum uncertainty (LQU) and concurrence correlations. The thermal behavior of quantum information quantifiers is analyzed under the influence of the spin–spin interaction, the spin–orbit interaction in the <span><math><mi>x</mi></math></span>-direction, and the uniformity and inhomogeneity of an applied external magnetic field in the <span><math><mi>x</mi></math></span>-direction. The study shows that quantum phenomena such as the sudden transition of entanglement and the appearance of stable correlations can be controlled by spin–spin and spin–orbit interactions as well as temperature. Furthermore, LQFI and concurrence correlations show greater robustness to temperature effects compared to LQU. After investigating the dependence of thermal correlations on the spin–spin interaction, the spin–orbit interaction, and the uniformity and inhomogeneity of the applied external magnetic field, we find that the enhancement of the <span><math><mi>x</mi></math></span>-spin–orbit interaction for quantum information quantifiers and the stability of the maximal correlation intervals depend on the applied external magnetic field. An increase in the uniformity or inhomogeneity of the applied magnetic field leads to a degradation of the quantum information resources, depending on the spin–orbit interaction. Finally, our results confirm that the dependence of the quantum information resources on the spin–spin couplings can be controlled by the spin–spin and spin–orbit interactions as well as by the applied external magnetic field.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 103-117"},"PeriodicalIF":4.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601737","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":"Entanglement hierarchies in multipartite scenarios","authors":"Hui Li ,&nbsp;Ting Gao ,&nbsp;Fengli Yan","doi":"10.1016/j.cjph.2025.02.039","DOIUrl":"10.1016/j.cjph.2025.02.039","url":null,"abstract":"<div><div>In this paper, we investigate the hierarchical structure of the <span><math><mi>n</mi></math></span>-partite quantum states. We present a whole set of hierarchical quantifications as a method of characterizing quantum states, which go beyond genuine multipartite entanglement measures and allow for fine identification among distinct entanglement contributions. This kind of quantifications, termed <span><math><mi>k</mi></math></span>-GM concurrence, can unambiguously classify entangled states into <span><math><mrow><mo>(</mo><mi>n</mi><mo>−</mo><mn>1</mn><mo>)</mo></mrow></math></span> distinct classes from the perspective of <span><math><mi>k</mi></math></span>-nonseparability with <span><math><mi>k</mi></math></span> running from <span><math><mi>n</mi></math></span> to 2, and comply with the axiomatic conditions of an entanglement measure. Compared to <span><math><mi>k</mi></math></span>-ME concurrence <span><span>[Phys. Rev. A 86 (2012) 062323]</span><svg><path></path></svg></span>, the hierarchical measures proposed by us embody advantages in distinguishing same class entangled states and measuring continuity. In addition, we establish the relation between <span><math><mi>k</mi></math></span>-ME concurrence and <span><math><mi>k</mi></math></span>-GM concurrence, and further derive a strong lower bound on the <span><math><mi>k</mi></math></span>-GM concurrence by exploiting the permutationally invariant part of a quantum state. Furthermore, we parametrize <span><math><mi>k</mi></math></span>-GM concurrence to obtain two more general and complete categories of quantifications, <span><math><mi>q</mi></math></span>-<span><math><mi>k</mi></math></span>-GM concurrence <span><math><mrow><mo>(</mo><mi>q</mi><mo>&gt;</mo><mn>1</mn><mo>)</mo></mrow></math></span> and <span><math><mi>α</mi></math></span>-<span><math><mi>k</mi></math></span>-GM concurrence <span><math><mrow><mo>(</mo><mn>0</mn><mo>≤</mo><mi>α</mi><mo>&lt;</mo><mn>1</mn><mo>)</mo></mrow></math></span>, which obey the properties enjoyed by <span><math><mi>k</mi></math></span>-GM concurrence as well. In particular, <span><math><mi>α</mi></math></span>-2-GM concurrence <span><math><mrow><mo>(</mo><mn>0</mn><mo>&lt;</mo><mi>α</mi><mo>&lt;</mo><mn>1</mn><mo>)</mo></mrow></math></span> determines that the GHZ state and the <span><math><mi>W</mi></math></span> state belong to the same hierarchy, and satisfies the requirement that the GHZ state is more entangled than the <span><math><mi>W</mi></math></span> state in multiqubit systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 337-347"},"PeriodicalIF":4.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681013","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":"Holographic dark matter profiles and their impact on wormhole formation and redshift in dRGT gravity","authors":"Sweeti Kiroriwal ,&nbsp;S.K. Maurya ,&nbsp;Jitendra Kumar ,&nbsp;A. Errehymy ,&nbsp;G. Mustafa ,&nbsp;K. Myrzakulov","doi":"10.1016/j.cjph.2025.02.033","DOIUrl":"10.1016/j.cjph.2025.02.033","url":null,"abstract":"<div><div>Inspired by holographic dark energy models, this work delves into a comprehensive examination of various energy density profiles as potential sources required for the existence of traversable wormhole solutions. In particular, we emphasize our analysis of wormhole solutions within the dRGT massive gravity framework. Notably, we propose novel wormhole solutions sustained by dark matter, utilizing the density profiles and rotational velocity expressions in conjunction with the modified field equations. These formulations facilitate the derivation of the redshift and shape functions, providing a thorough framework for analyzing the geometry and physical properties of the wormhole. The solution demonstrates a traversable wormhole that violates the null energy condition within specific ranges of the free parameters. Using embedding diagrams, we investigate the geometry of these wormholes and determine the stability of the solutions by evaluating the equilibrium conditions. Finally, the deflection angle <span><math><mrow><mover><mrow><mi>α</mi></mrow><mrow><mo>ˆ</mo></mrow></mover><mrow><mo>(</mo><msub><mrow><mi>r</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>)</mo></mrow></mrow></math></span> remains entirely negative for the parameter ranges <span><math><mrow><mi>λ</mi><mo>∈</mo><mrow><mo>[</mo><mn>18</mn><mo>,</mo><mn>25</mn><mo>]</mo></mrow></mrow></math></span>, <span><math><mrow><mi>χ</mi><mo>∈</mo><mrow><mo>[</mo><mn>1</mn><mo>.</mo><mn>5</mn><mo>,</mo><mn>2</mn><mo>]</mo></mrow></mrow></math></span>, and <span><math><mrow><mi>m</mi><mo>∈</mo><mrow><mo>[</mo><mn>18</mn><mo>,</mo><mn>20</mn><mo>]</mo></mrow></mrow></math></span>. This indicates that photons experience repulsive gravitational effects, resulting in light rays being deflected outward from the wormholes instead of being drawn in.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 404-421"},"PeriodicalIF":4.6,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725420","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":"Enhancement of squeezing and entanglement in a three-level laser with a parametric amplifier coupled to a two-mode thermal reservoir","authors":"Aliyyi Adem","doi":"10.1016/j.cjph.2025.02.032","DOIUrl":"10.1016/j.cjph.2025.02.032","url":null,"abstract":"<div><div>This study investigates the quantum properties of cavity light emitted from a coherently driven three-level, non-degenerate laser system integrated with a parametric amplifier and coupled to a two-mode thermal reservoir in an open cavity. The analysis, based on the normal ordering of noise operators associated with the thermal reservoir, indicates that the average photon number is affected by the presence of initially seeded thermal light, with higher thermal light levels leading to a reduced mean photon number. The coupling parameter <span><math><mrow><mo>(</mo><mi>Ω</mi><mo>)</mo></mrow></math></span> and the pump mode amplitude <span><math><mrow><mo>(</mo><mi>ɛ</mi><mo>)</mo></mrow></math></span> play a significant role in determining the mean photon number, with higher values of these parameters resulting in an increase in the mean photon number. Furthermore, a comprehensive analysis of the quadrature squeezing behavior in two-mode cavity light reveals a maximum squeezing of 64.4% at <span><math><mi>ɛ</mi></math></span> = 0.03. The coupling parameter <span><math><mi>Ω</mi></math></span> and the spontaneous emission rate <span><math><mrow><mo>(</mo><mi>γ</mi><mo>)</mo></mrow></math></span> were found to be crucial in determining the degree of squeezing, with higher spontaneous emission rates leading to reduced squeezing. The presence of initially seeded thermal light significantly affected squeezing, with higher thermal light levels resulting in diminished squeezing. However, manipulating <span><math><mi>ɛ</mi></math></span> provides a powerful means to significantly enhance compression. The behavior of photon entanglement showed a notable improvement with increasing <span><math><mi>ɛ</mi></math></span>. Compared to existing systems, the interplay of <span><math><mi>ɛ</mi></math></span>, <span><math><mrow><mo>〈</mo><msub><mrow><mi>n</mi></mrow><mrow><mi>t</mi><mi>h</mi></mrow></msub><mo>〉</mo></mrow></math></span>, and <span><math><mi>γ</mi></math></span> enabled unprecedented control over entanglement. This could make the system highly advantageous for quantum technologies. Compared to existing systems, the interplay of <span><math><mi>ɛ</mi></math></span>, <span><math><mrow><mo>〈</mo><msub><mrow><mi>n</mi></mrow><mrow><mi>t</mi><mi>h</mi></mrow></msub><mo>〉</mo></mrow></math></span>, and <span><math><mi>γ</mi></math></span> could position this system as a promising candidate for advancing quantum technologies.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 82-102"},"PeriodicalIF":4.6,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593313","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":"Exploring the potential of liquid phase exfoliation combined solvothermal synthesis of borophene nanosheets for innovative lead and mercury ion detection in electrochemical sensing","authors":"Tahani I. Al - Muhimeed","doi":"10.1016/j.cjph.2025.02.029","DOIUrl":"10.1016/j.cjph.2025.02.029","url":null,"abstract":"<div><div>In this study, we synthesized few-layered, large-flake borophene nanosheets using a liquid-phase exfoliation and solvothermal method. We characterized the synthesized borophene through various techniques, including Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), to investigate its structural and morphological properties. To better understand the interaction mechanisms between borophene and heavy metal ions, we conducted density functional theory (DFT) calculations. The optimized structures, frontier molecular orbital analysis, and molecular electrostatic potential maps provided valuable insights into the nature of the supramolecular interactions between Pb (II), Hg (II), and the borophene surface. We also examined the electrochemical performance of borophene-modified glassy carbon electrodes (GCEs) using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results showed a wide linear response range (0.1–100 μM) and a remarkably low detection limit of 0.1 μM for both Pb (II) and Hg (II) ions. These findings demonstrate the potential of borophene-modified GCEs as a highly sensitive and selective platform for detecting heavy metal ions, offering significant advantages over traditional analytical techniques. Estimated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The sensor exhibited a wide linear response range (0.1–100 μM) and a remarkably low detection limit of 0.1 μM for Pb (II) and Hg (II) ions. These results demonstrate the Potential of BPS-modified GCEs as a highly sensitive and selective platform for heavy metal ion detection, offering significant advantages over traditional analytical techniques.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 752-764"},"PeriodicalIF":4.6,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817575","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}