Chinese Journal of Physics最新文献

{"title":"Photoinduced coexistence of spin-polarized antichiral and chiral edge states enabling defect-induced spin filters","authors":"Jia-En Yang ,&nbsp;Xiao-Long Lü ,&nbsp;En-Jia Ye","doi":"10.1016/j.cjph.2025.12.025","DOIUrl":"10.1016/j.cjph.2025.12.025","url":null,"abstract":"<div><div>Topological edge states are crucial for designing future electronic devices. This study achieves mixed coexisting spin-polarized antichiral and chiral edge states by radiating the upper or lower half of the stanene nanoribbons with off-resonant circularly polarized light. Specifically, the circularly polarized light alters the edge states on one boundary, while those on the other remain unchanged. Unlike the antichiral edge states achieved by the modified Haldane model, these photoinduced antichiral edge states are fragile with narrow nanoribbons but robust with wide ones. This nanoribbon width dependence is mainly because the associated bulk states behave similarly to the inner-edge state, whose robustness is related to the nanoribbon width. Using the mixed coexisting edge states, defect-induced and external-field-induced spin filters are proposed. These edge states and spin filters could prove vital for designing future electronic devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"99 ","pages":"Pages 383-392"},"PeriodicalIF":4.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880789","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":"Unlock unprecedented accuracy in viral detection with Virusure: A Smartphone integrated sensor empowered by Trailing Moving Average algorithm","authors":"Asmita Gupta ,&nbsp;Chansi ,&nbsp;Inderpreet Singh ,&nbsp;Siddhi Nagar ,&nbsp;Ashish Mani ,&nbsp;Susanta Sinha Roy ,&nbsp;A.V.S.S. Narayana Rao ,&nbsp;Sudhir Kapoor ,&nbsp;Tinku Basu","doi":"10.1016/j.cjph.2025.09.016","DOIUrl":"10.1016/j.cjph.2025.09.016","url":null,"abstract":"<div><div>Viral infections pose a significant global health burden, underscoring the critical need for proactive measures such as vaccination and rapid diagnostics. Complex laboratory procedures involved in traditional viral detection result in delayed diagnosis and treatment. Addressing this challenge, we introduce \"Virusure,\" an innovative ASSURED (Affordable, sensitive, specific, user-friendly, rapid, and robust, equipment-free, and deliverable to end-users) virus sensor designed for swift and accessible detection. This portable device integrates a handheld potentiostat with a smartphone via Bluetooth, enabling rapid (∼30 min) detection of viral proteins in throat swab samples. In response to the recent COVID-19 pandemic caused by the SARS-CoV-2 virus, \"Virusure\" has been specifically calibrated for the detection of the nucleocapsid protein (Npro) of the SARS-CoV-2 virus. The sensor exhibits a broad detection range, equivalent to a viral load of ∼10⁶ virus particles per mL, with excellent linearity (R² = 0.98). It also demonstrates high analytical performance and a remarkable specificity of minimal cross-reactivity (&lt;10 %) with other common respiratory viruses. To ensure accuracy and reliability, the Trailing Moving Average (MA) algorithm with a window size of 7 (MA7) was implemented using Python's Pandas library. The approach allows “Virusure” to achieve high performance and cost-effectivity. Smartphone integration allows \"Virusure\" to offer a user-friendly interface for convenient self-testing and remote disease monitoring capabilities, holding immense potential in diagnostic and public health care sector.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 299-313"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324964","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":"Enhanced SIFT operations in mediated semi-quantum key distribution: Protocol design and simulation","authors":"Praise O. Arowolo ,&nbsp;Yuan Tian ,&nbsp;Genqing Bian ,&nbsp;Jian Li","doi":"10.1016/j.cjph.2025.09.013","DOIUrl":"10.1016/j.cjph.2025.09.013","url":null,"abstract":"<div><div>Quantum cryptography promises secure communication, yet fully quantum protocols face significant implementation challenges. Mediated semi-quantum key distribution (MSQKD) protocols address this issue by allowing classical users with limited quantum abilities to establish secure keys with assistance from an untrusted quantum server. This paper presents an efficient MSQKD protocol using single photons, achieving enhanced practicality and security. The protocol strengthens security by incorporating SIFT and CTRL operations, where classical users discard, replace, and reflect qubits without disturbance. It reduces the quantum overhead on the third party (TP), achieving a qubit efficiency of 1/12. Advanced security mechanisms, including decoy state and quantum channel testing, further safeguard communication. A noise model is introduced to assess robustness under real-world conditions, with IBM’s Qiskit simulations confirming the protocol’s resilience against various attacks. This work provides a practical solution for secure quantum communication in realistic scenarios.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 861-873"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516920","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":"Adsorption properties and sensing capabilities of pristine and Stone–Wales defected BN nanosheets for lung cancer VOC biomarkers: A DFT investigation","authors":"Alaa M. Khudhair ,&nbsp;Hasan Ali Dhahi","doi":"10.1016/j.cjph.2025.07.036","DOIUrl":"10.1016/j.cjph.2025.07.036","url":null,"abstract":"<div><div>Lung cancer (LC) continues to be a predominant cause of global mortality, with early identification being a significant challenge due to the constraints of existing detection technologies, which are frequently invasive, expensive, and inaccessible. This study utilized density functional theory (DFT) to systematically examine the efficacy of both pristine and Stone–Wales (SW) defect-engineered BN nanosheets as selective biosensors for the early detection of LC-associated volatile organic compounds (VOCs): benzene (C₆H₆), isoprene (C₅H₈), and methyl-cyclopentane (C₆H₁₂). Thorough simulations demonstrated that the incorporation of software faults markedly modifies the electrical structure of BN nanosheets, thereby improving their sensitivity and selectivity for the target VOCs. The adsorption energy estimates (E_ads) were consistently negative across all systems, signifying stable and exothermic interactions. The adsorption energies of benzene, isoprene, and methyl-cyclopentane on virgin BN were −0.787 eV, −0.893 eV, and −0.740 eV, respectively; for the BN-SW substrate, the values were −0.770 eV, −0.839 eV, and −0.603 eV, respectively. These findings validate the thermodynamic favorability and strong interaction between the VOCs and the sensor surfaces. The computed global reactivity descriptors and recovery durations further substantiate the efficacy of BN and BN-SW nanosheets for real-time biosensing. This study illustrates that both pristine and defect-engineered BN nanosheets, especially those with Stone–Wales defects, present highly promising platforms for the early detection of lung cancer biomarkers, facilitating the future creation of efficient, non-invasive diagnostic devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 46-58"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097622","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 phase transitions in class-D topological systems with nonreciprocal couplings","authors":"Kai-Xin Hu ,&nbsp;Yu Yan ,&nbsp;Zhi-Xu Zhang ,&nbsp;Shutian Liu ,&nbsp;Wen-Xue Cui ,&nbsp;Ji Cao ,&nbsp;Shou Zhang ,&nbsp;Hong-Fu Wang","doi":"10.1016/j.cjph.2025.09.003","DOIUrl":"10.1016/j.cjph.2025.09.003","url":null,"abstract":"<div><div>We investigate class-D topological systems with nonreciprocal couplings and demonstrate their ability to host anomalous phase transitions. Specifically, we precisely determine the topological phase, characterized by the Chern number and bulk polarization, using the Green’s function and Wilson loop approaches. We rigorously confirm the validity of the anomalous transition lines by observing a remarkable consistency between the analytical zero-energy conditions and numerical phase transition boundaries. Meanwhile, bound states are present at the anomalous transition lines, but absent at the normal transition lines. Moreover, these bound states are localized at the system boundaries and are robust to disorders. Our work demonstrates that the anomalous transition lines in class-D Hermitian systems with nonreciprocal couplings exhibit richer physical phenomena than the normal transition lines, advancing the understanding of topological phase transitions.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 191-202"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156440","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":"Non-similar solutions for Darcy–Forchheimer flow with multiple dissipative mechanisms: a spectral collocation approach","authors":"Muhammad Idrees Afridi ,&nbsp;M.P. Mkhatshwa ,&nbsp;Muhammad Qasim ,&nbsp;Ali J. Chamkha","doi":"10.1016/j.cjph.2025.08.014","DOIUrl":"10.1016/j.cjph.2025.08.014","url":null,"abstract":"<div><div>The Darcy–Forchheimer flow of an electrically conducting, dissipative fluid over a stretching flat sheet is investigated. Entropy generation analysis is conducted considering three distinct dissipative mechanisms: viscous, ohmic, and porous dissipation. Governing equations are modelled to analyze the flow and thermal characteristics within the boundary layer region using suitable assumptions. A novel transformation is introduced wherein the Forchheimer number varies along the streamwise direction. This transformation yields a set of non-similar partial differential equations (PDEs) from the governing boundary layer equations. The numerical solution of these nonlinear PDEs was obtained using an efficient computational approach, namely the overlapping multi-domain spectral collocation scheme. The influence of various flow parameters on different flow characteristics and relevant quantities is presented graphically and discussed in detail. Velocity profile decreases with increasing magnetic parameter and Forchheimer number but increases with a higher porosity parameter. Temperature gradients near the wall intensify at higher Eckert numbers and magnetic parameters, while the thermal boundary layer thickens with a higher Forchheimer number. Entropy generation increases with the magnetic parameter, Forchheimer number, Eckert number, and Prandtl number but decreases with a higher porosity parameter and temperature difference parameter.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 254-276"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263280","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":"Cosmology, new entropy and thermodynamics of apparent horizon","authors":"S.I. Kruglov","doi":"10.1016/j.cjph.2025.08.045","DOIUrl":"10.1016/j.cjph.2025.08.045","url":null,"abstract":"<div><div>We propose a new nonadditive entropy of the apparent horizon <span><math><mrow><msub><mi>S</mi><mi>K</mi></msub><mo>=</mo><msub><mi>S</mi><mrow><mi>B</mi><mi>H</mi></mrow></msub><mo>/</mo><mrow><mo>(</mo><mn>1</mn><mo>+</mo><mi>γ</mi><msubsup><mi>S</mi><mrow><mi>B</mi><mi>H</mi></mrow><mn>2</mn></msubsup><mo>)</mo></mrow></mrow></math></span>, where <span><math><msub><mi>S</mi><mrow><mi>B</mi><mi>H</mi></mrow></msub></math></span> is the Bekenstein–Hawking (BH) entropy and consider the description of a new cosmology. When parameter <span><math><mi>γ</mi></math></span> vanishes (<span><math><mrow><mi>γ</mi><mo>→</mo><mn>0</mn></mrow></math></span>) our entropy <span><math><msub><mi>S</mi><mi>K</mi></msub></math></span> is converted into BH entropy <span><math><msub><mi>S</mi><mrow><mi>B</mi><mi>H</mi></mrow></msub></math></span>. By using the holographic principle a new model of holographic dark energy is studied. We obtain the generalised Friedmann equations for Friedmann–Lemaître–Robertson–Walker (FLRW) space-time for the barotropic matter fluid with the equation of state (EoS) <span><math><mrow><mi>p</mi><mo>=</mo><mi>w</mi><mi>ρ</mi></mrow></math></span>. From the second modified Friedmann equation we find a dynamical cosmological constant. The density of the dark energy <span><math><msub><mi>ρ</mi><mi>D</mi></msub></math></span>, pressure <span><math><msub><mi>p</mi><mi>D</mi></msub></math></span>, and the deceleration parameter <span><math><mi>q</mi></math></span> corresponding to our model are computed. It is shown that at some EoS parameter <span><math><mi>w</mi></math></span> and the entropy parameter <span><math><mi>γ</mi></math></span> there are phases of universe acceleration, deceleration and eternal inflation. Our model, with the help of the holographic principle, can describe the universe inflation and late time of the universe acceleration. We show that the current deceleration parameter <span><math><mrow><msub><mi>q</mi><mn>0</mn></msub><mo>≈</mo><mo>−</mo><mn>0.535</mn></mrow></math></span> is realized at some model parameters. Entropic cosmology with our entropy proposed is equivalent to cosmology based on the teleparallel gravity with the function <span><math><mrow><mi>F</mi><mo>(</mo><mi>T</mi><mo>)</mo></mrow></math></span>. The generalised entropy of the apparent horizon with the holographic dark energy model can be of interest for new cosmology.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 277-286"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263663","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":"Structural, electronic, magnetic, half-metallic, and thermoelectric properties of a novel rare rarth-based quaternary Heusler compounds","authors":"Saadi Berri ,&nbsp;Ayache Mebarek Azzem ,&nbsp;Djamel Maouche ,&nbsp;Çağatay Yamçıçıer","doi":"10.1016/j.cjph.2025.11.008","DOIUrl":"10.1016/j.cjph.2025.11.008","url":null,"abstract":"<div><div>First-principles calculations were performed to investigate the structural, electronic, half-metallic and thermoelectric properties of 27 specific rare-earth-based quaternary Heusler compounds, selected from a palette of R (Pr, Nd, Gd, Tb, La), X (Co, Fe, Ru), Y (Mn, V, Cr), and Z (Al, Ga, In) elements. We have opted for a Full-Potential Linearized Augmented Plane Wave (FP-LAPW) method based on the Density Functional Theory (DFT) as implemented in Wien2k for our calculations. For the comprehensive analysis, PBE-GGA, and TB-mBJ functionals were used. The ground state parameters of RE-EQHs were determined, including the lattice parameter, total energy bulk modulus, and its derivative. The electronic structure of the RE-EQHs under consideration indicates that they are half-metallic ferromagnetic alloys. The total spin magnetic moments for all the half-metals satisfy the Slater-Pauling 18 electron-rule, confirming the existence of the half-metallic gap. The Seebeck coefficient, power factor, and semiclassical Boltzmann theory figure of merit are calculated using Boltztrap code to study these materials' thermoelectric properties. The compounds exhibit exceptionally high Seebeck coefficients (with values up to ≈ 1000 μV/K) and promising thermoelectric figures of merit that approach the ideal benchmark of 1.0 at 900K, positioning them as strong candidates for high-temperature thermoelectric applications.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 1103-1115"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614687","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":"First-principles study of the electronic and gas adsorption properties of one dimensional single-chain GaXY (X = S, Se; Y = F, Cl, Br, I)","authors":"Lanyin Liu ,&nbsp;Xinghong Cai ,&nbsp;Ziyi Ran ,&nbsp;Qun Hui ,&nbsp;Min Wang","doi":"10.1016/j.cjph.2025.11.015","DOIUrl":"10.1016/j.cjph.2025.11.015","url":null,"abstract":"<div><div>The successful reported synthesis of one-dimensional (1D) helical single-chain Gallium Sulfur Iodine (GaSI) has sparked our interest in this novel material. Using first-principles calculations, we theoretically investigated the structural and electronic properties of GaSI and explored the adsorption of various gases on its surface. 1D GaSI is predicted to be stable at temperatures up to 500 K. The material, GaSI, is characterized by a wide bandgap of 2.05 eV, making it of interest for optoelectronic devices. Computational analysis of the adsorption energies and electronic changes upon gas adsorption on GaSI indicates that GaSI is a promising sensor for detection of Nitrogen Monoxide (NO). After elemental substitution, we also studied other gallium sulfur halides. A related compound Gallium Sulfur Fluoride (GaSF), which is formed after elemental substitution (replacing Iodide with Fluorine) demonstrates enhanced detection properties for NO, highlighting the tunability of this material class. The research concludes that these 1D Gallium Sulfur Halides (like GaSI and GaSF) are viable low-dimensional materials for next-generation technology in several fields like nanoelectronics, optoelectronics, photovoltaics, and sensing applications.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 1024-1033"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614688","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 signal-driven gene diversity: a novel cascade approach","authors":"Zhenzhen Guo ,&nbsp;Haowen Chen ,&nbsp;Wenjie Cao ,&nbsp;Huahai Qiu ,&nbsp;Tianshou Zhou","doi":"10.1016/j.cjph.2025.09.007","DOIUrl":"10.1016/j.cjph.2025.09.007","url":null,"abstract":"<div><div>Cells must have the ability to respond to various external signals, but our understanding of this signal response is very limited. Here we analyze a simple cascade model of stochastic gene expression, which assumes that the upstream (input) gene is expressed in a constitutive manner whereas the downstream (output) gene is expressed in a bursty fashion via a two-state model, and that the former regulates the latter via transcription factors (products of the former). By large scale sampling in the space of model parameters, we find that the output distributions can exhibit diverse patterns such as unimodal, bimodal or trimodal modes, depending on the regulation way (positive or negative). These patterns, which are different from those in the case of no regulation, are independent of the choice of parameter values and hence qualitatively invariant. Diverse expression patterns resulting from signal response would be important for cell fate decisions and utilized by cells for a better survival in complex environments.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 125-136"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109198","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}