Chinese Journal of Physics最新文献

{"title":"Multi-scroll expansion of 3D and 4D Jerk systems and its DSP implement","authors":"Jingxu Zhang ,&nbsp;Guodong Li ,&nbsp;Hepeng Pan ,&nbsp;Xiangkun Chen","doi":"10.1016/j.cjph.2025.02.002","DOIUrl":"10.1016/j.cjph.2025.02.002","url":null,"abstract":"<div><div>The multi-scroll chaotic systems have significant potential in practical applications. By introducing control functions and modifying variable dimensionality, we achieve both single-scroll and dual-scroll expansions in the three-dimensional Jerk system, with Lyapunov exponent analysis confirming that the system retains its chaotic nature. The distribution of equilibrium points and the bifurcation diagrams further illustrate the scroll generation mechanism. By extending the system to four dimensions, we validate the feasibility of multi-scroll expansion in this higher-dimensional framework through numerical simulations. Furthermore, the DSP implementation demonstrates that the constructed multi-scroll system offers flexibility in both the number and arrangement of scrolls, thus laying a foundation for further research and practical engineering applications.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"94 ","pages":"Pages 627-649"},"PeriodicalIF":4.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487056","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":"Insights in the nonlinear instability of an annular jet inclosing an electrified Eyring–Powell viscoelastic fluid","authors":"Galal M. Moatimid,&nbsp;Mona A.A. Mohamed,&nbsp;Khaled Elagamy","doi":"10.1016/j.cjph.2025.02.001","DOIUrl":"10.1016/j.cjph.2025.02.001","url":null,"abstract":"<div><div>The exploration of nonlinear instability in an annular jet containing an electrified Eyring–Powell viscoelastic fluid (EPF) is essential in industrial and biological applications, enhancing fluid control and optimizing intricate processes. The current model is pervaded by the impact of a uniform axial electric field (EF). Additionally, the flow is assumed to flow in a permeable media. The study explores the impact of EF effects on jet breakup and stability, providing new criteria of instability thresholds and deformation patterns. It is well known that the implementation of an axial EF may produce multiple instability modes, potentially leading to breakdown or formation of complex structures within the annular jet. The viscous potential theory (VPT) is exploited to abbreviate the mathematical intricacy. The nonlinear methodology foundations in solving the linear governing partial differential equations (PDEs) of motion are resolved through the applicable nonlinear boundary conditions (BCs) to yield coupled nonlinear ordinary differential equations (ODEs) that judge the interface displacements. The study scrutinizes the surface tensions (STs) in a broad context, together with the symmetric and anti-symmetric perturbation modes. He's frequency formulation (HFF) strengthens the innovative non-perturbative approach (NPA). It is employed to transform conventional nonlinear ODEs into linear ones. A set of non-dimensional physical parameters is accomplished. The validation between the nonlinear and linear ODEs is constructed by consuming the Mathematica Software (MS). A series of graphs are provided to illustrate the impact of various non-dimensional physical parameters in the stability configuration. The efficacy and accuracy of the NPA are validated by some figures and tables. It is found that the structure becomes gradually stable as the permeability of the medium; the inner and outer radii grow. Simultaneously, it converts fewer stable with the rise of the electric Bond number and the non-Newtonian parameter. Consistent decay behavior is seen in the temporal histories of the periodic solutions, suggesting that the outcomes are stable. Additionally, the associated phase plane curves are shown in a variety of plots that resemble symmetric closed curves and feature spiral curves pointing inward at a single point.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"94 ","pages":"Pages 751-788"},"PeriodicalIF":4.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529204","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":"Stagnation slip flow of ternary hybrid nanofluid over an exponentially shrinking/Stretching sheet with joule heating, MHD, and thermal radiation effects","authors":"Farah Nadzirah Jamrus ,&nbsp;Iskandar Waini ,&nbsp;Umair Khan ,&nbsp;Anuar Ishak","doi":"10.1016/j.cjph.2025.01.042","DOIUrl":"10.1016/j.cjph.2025.01.042","url":null,"abstract":"<div><div>The stagnation point flow of a ternary hybrid nanofluid (THNF) over a sheet that stretches or shrinks exponentially is investigated in this study. The primary goal is to assess the implication of Joule heating, magnetohydrodynamics (MHD), thermal radiation, and boundary slips on the physical quantities and flow profiles. Besides, attention is also given to the occurrences of multiple solutions in this fluid flow situation. The continuity, momentum and energy equations that described the fluid flow problem are converted into a simpler form of ordinary differential equations (ODEs). This is achieved by applying a similarity transformation, which make the equations easier to solve. Solving the resulting equations using the bvp4c solver in MATLAB software yields results that are analyzed and illustrated through a combination of tables and graphical representations. The analysis reveals that, for a shrinking sheet, an increase in Joule heating reduces the heat transfer. Similarly, a higher thermal slip factor leads to a decreased heat transfer rate in this case. In contrast, parameters such as magnetic field strength, radiation, velocity slip and suction contribute to enhancing the heat transfer rate of THNF. Furthermore, the results indicate that the THNF used in this study exhibits a better heat transfer rate compared to nanofluid (NF) and hybrid nanofluid (HNF). Notably, a shrinking sheet is observed to exhibit multiple solutions when the shrinking parameter falls within a defined range, specifically when <span><math><mrow><mi>λ</mi><mo>&gt;</mo><msub><mi>λ</mi><mi>c</mi></msub></mrow></math></span>. By scrutinizing the analysis of stability, the first solution (upper solution) was determined to be consistently stable and applicable in real-world settings. These findings offer insightful information into the optimization of heat transfer processes in nanofluid-based systems under complex flow conditions. However, these findings apply only to a THNF mixture of alumina, copper, and titania. THNFs may have different flow dynamics and thermal properties depending on the mixtures of nanoparticles.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"94 ","pages":"Pages 518-539"},"PeriodicalIF":4.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453026","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":"Deterministic preparation of GHZ entangled states with multiple superconducting qutrits in circuit QED","authors":"Jia-Heng Ni ,&nbsp;Wang-Chu Lv ,&nbsp;Dong-Xuan Zhang ,&nbsp;Liang Bin ,&nbsp;Yu Zhang ,&nbsp;Yang Yu ,&nbsp;Qi-Ping Su ,&nbsp;Chui-Ping Yang","doi":"10.1016/j.cjph.2025.01.040","DOIUrl":"10.1016/j.cjph.2025.01.040","url":null,"abstract":"<div><div>Over the past decade, several works have been devoted to the generation of entangled states with superconducting (SC) qubits. Recently, attention has shifted to the generation of entangled states with SC qutrits (three-level quantum systems). However, the existing works are limited to the preparation of a maximally entangled EPR pair with two SC qutrits and a Greenberger-Horne-Zeilinger (GHZ) entangled state of three SC qutrits. We here propose a simple method to create a GHZ entangled state of multiple SC qutrits in circuit QED. The GHZ state is generated by employing multiple SC qutrits coupled to a microwave cavity or resonator. This proposal essentially operates by the cavity-qutrit dispersive interaction. By using this proposal, a GHZ state with an arbitrary number of SC qutrits can, in principle, be created. Since only a coupler cavity is utilized, the circuit hardware resources are minimized. No auxiliary energy levels of the qutrits are needed for the entangled state preparation. The GHZ state can be created deterministically. As an example, we analyze the experimental feasibility of preparing a GHZ state of five SC transmon qutrits within current circuit QED technology. This proposal is universal and can be extended to create a GHZ entangled state of multiple matter qutrits (e.g., atomic qutrits, quantum-dot qutrits, NV-center qutrits, Magnon qutrits, and various SC qutrits) by employing multiple natural or artificial three-level atoms coupled to a microwave or optical cavity.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"94 ","pages":"Pages 504-517"},"PeriodicalIF":4.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436393","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":"Impact of non-metricity and matter source on the geometry of anisotropic spheres","authors":"M. Zeeshan Gul ,&nbsp;M. Sharif ,&nbsp;Adeeba Arooj ,&nbsp;Baiju Dayanandan","doi":"10.1016/j.cjph.2024.11.021","DOIUrl":"10.1016/j.cjph.2024.11.021","url":null,"abstract":"<div><div>This paper delves into the impact of extended symmetric teleparallel theory on anisotropic compact stellar structures. The explicit field equations were formulated by considering a minimum model of this extended gravity. Basically, the Darmois junction conditions are used to determine the unknown constants of metric coefficients. We explore some significant properties of the compact stars under consideration to check their viable existence in this modified framework. The Tolman–Oppenheimer–Volkoff equation assess the equilibrium state of the compact stars. Moreover, the stability analysis is defined by using methods based on sound speed (related to how disturbances propagate in the star) and adiabatic index (related to the thermodynamic behavior of the star). We find that the proposed compact stars in the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> gravity are physically viable and stable.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 256-270"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168056","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":"Off-axis dispersion-managed metasurface for routing orbital angular momentum mode and wavelength multiplexing channels","authors":"Shu Chen ,&nbsp;Qingji Zeng ,&nbsp;Haisheng Wu ,&nbsp;Pin Zhong ,&nbsp;Jing Wang ,&nbsp;Junmin Liu ,&nbsp;Huapeng Ye ,&nbsp;Dianyuan Fan ,&nbsp;Shuqing Chen","doi":"10.1016/j.cjph.2024.11.011","DOIUrl":"10.1016/j.cjph.2024.11.011","url":null,"abstract":"<div><div>Offering the strengths of mode orthogonality and physical independence from wavelength dimension, optical orbital angular momentum (OAM) modes hold immense potential for enhancing communication capacity through multi-dimensional channel multiplexing. Although methods using angle-separated gratings have seen advances in multi-dimensional (de)multiplexing, routing these multiplexed channels is impeded by the resultant mode-wavelength dispersion resulting from Bragg diffraction of grating. This induces not only multi-level mode conversion but also confined wavelength separation scope, posing obstacles in spatial reallocation of both OAM modes and wavelengths for routing channels. To tackle these issues, we propose a wavelength-dependent multi-foci transformation solution for OAM mode-wavelength routing that utilizes an off-axis dispersion-managed metasurface. Incorporated with composite lens phases and helical modulations, the metasurface enables the precise manipulation of OAM mode-wavelength dispersion upon multi-foci Fourier transform without multi-level diffraction, facilitating both efficient mode conversion and versatile wavelength separation. Harnessing the multi-dimensional independence, this approach establishes a high-dimensional linear mapping relationship among OAM modes, wavelengths, and spatial positions, thereby achieving the routing of mode-wavelength hybrid channels. In a proof-of-concept simulation, we demonstrated the successful routing of 20 channels with five OAM modes and four wavelengths across four depth planes, with the average channel crosstalk below -15.2 dB. Additionally, 16-ary quadrature amplitude modulation signals carried by these 20 multiplexed channels were successfully routed, and the bit-error-rates approach 1 × 10^-5. Our method shows flexibility in spatial reallocation of both OAM modes and wavelengths, as further explored by altering the number of routing channels and their spatial positions, which may provide new insights for advanced OAM-based optical communications.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 46-55"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167083","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":"Transition temperature to the Bose-Einstein condensation of spin polarized tritium, hydrogen, and 4He gases using the second virial coefficient","authors":"B.R. Joudeh","doi":"10.1016/j.cjph.2024.12.011","DOIUrl":"10.1016/j.cjph.2024.12.011","url":null,"abstract":"<div><div>In this study, the transition temperature to the Bose-Einstein condensation of spin-polarized tritium (T↓), hydrogen (H↓), and ⁴He gases is obtained based on the second virial coefficient. The computations are performed using the Silvera triplet-state potential and HFDHE2 potential for spin-polarized atomic hydrogen isotopes and ⁴He gas, respectively. The thermophysical properties of these Bose systems are computed, including the Helmholtz free energy, entropy, the acoustic virial coefficient, and the second virial coefficient. Large negative values of the second virial coefficient and the acoustic virial coefficient are obtained, reflecting the strong overall attraction of inter-bosonic potential, which gives an indication of the onset of condensation at very low temperatures. At the transition temperature, the stable minimum of the Helmholtz free energy is an indicator of the sort of Bose-Einstein condensation (BEC). As a consequence, the system made a transition to a higher-order state, which is recognized with BEC and explored. The transition temperature is shifted towards a lower value than for the ideal Bose gas.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 318-327"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167917","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":"Joule heating and viscous dissipation impact on MHD-hybrid nanofluid flow over non-isothermal stretching/shrinking surface: Dual solution and stability analysis","authors":"Sakinah Idris ,&nbsp;Anuar Jamaludin ,&nbsp;Roslinda Nazar ,&nbsp;Ioan Pop","doi":"10.1016/j.cjph.2024.12.019","DOIUrl":"10.1016/j.cjph.2024.12.019","url":null,"abstract":"<div><div>Recent scientific research has consistently demonstrated that hybrid nanofluids have superior thermophysical properties, promising heat transfer efficiency improvers in engineering applications. Thus, the aim of this study is to numerically examine the effects of the magnetohydrodynamic (MHD), suction, Joule heating and viscous dissipation parameter on the intricate flow and thermal transfer dynamics of a hybrid nanofluid streaming over a permeable non-isothermal surface with a further investigation into duality of solutions. Similarity transformation reduced the governing equations into ordinary differential equations (ODEs), which were resolved using the MATLAB bvp4c function. The concurrent effects of the governing parameters on the temperature and velocity profiles, local skin friction coefficient, and the local Nusselt number were examined by hybridizing magnetite (Fe₃O₄) and multi-walled carbon nanotubes (MWCNT) immersed in water. The most notable finding of this study reported a higher magnetic parameter and nanoparticle volume concentration increased the skin friction coefficient in the shrinking region. Remarkably, a higher Eckert number increased the thermal boundary layer and reduced the heat transfer rate. Stability analysis confirmed that the first solution was physically stable and reliable. These discoveries contribute valuable insights into optimizing heat transfer in advanced engineering systems where precise thermal control is critical and guidance for scholars in investigating the experimental or numerical dimensions of flow dynamic of hybrid nanofluid.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 611-631"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrodynamic Impact of Dusty Fluid-Suspended Solid Particles in a Single-Walled Corrugated Channel for Water-Curing Infrastructure Networks","authors":"M.M. Maher ,&nbsp;Kh. S. Mekheimer ,&nbsp;H. Al‐Wahsh ,&nbsp;A.Z. Zaher","doi":"10.1016/j.cjph.2024.08.014","DOIUrl":"10.1016/j.cjph.2024.08.014","url":null,"abstract":"<div><div>Infrastructure engineering is impacted by solid particles in fluids, and engineering components are influenced by fluid flow methods. This work explores the effects of dusty fluids with suspended solid particles in a single-walled corrugated channel using electromagnetic hydrodynamics. Potential, continuity, and momentum equations were employed to study the periodic sinusoidal waves in the corrugations of two wavy walls using the perturbation method. We assessed the impact of corrugation on velocity for EMHD fluid flow using mathematical computation, concentrating on the analytical velocity solutions. The analysis of velocity profiles through graphs reveals that corrugation affects fluid and particle velocity behavior, with small amplitude reducing wave effects and dusty particles boosting velocity. The proposed model uses mathematical induction to solve engineering problems using corrugated wall conditions for fluid control during curing stages. It may be valuable for sanitation networks, rainwater drainage networks, and irrigation systems. In the end, a thorough examination of the obtained results and information from past papers demonstrated a high level of agreement. Additionally, its use in the curing of water will offer alternative methods of managing the flowing fluid than mechanical pressure.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 482-502"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167085","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":"Terahertz characteristics of Mg-doped CuCrO2 and its application to 2π phase modulators with high tunable capability","authors":"Chao-Kuei Lee ,&nbsp;Jun-Ting Guo ,&nbsp;Pei-Jung Wu ,&nbsp;Jia-Chi Lan ,&nbsp;Yi-Han Lin ,&nbsp;Yi-An Wei ,&nbsp;Te-Wei Chiu ,&nbsp;Chien-Ming Lei ,&nbsp;Tsung-Hsien Lin ,&nbsp;Chan-Shan Yang","doi":"10.1016/j.cjph.2024.09.029","DOIUrl":"10.1016/j.cjph.2024.09.029","url":null,"abstract":"<div><div>We have conducted a detailed characterization of the optical properties of Mg-doped CuCrO₂ (CuCrO₂: Mg) in the terahertz (THz) frequency range. By utilizing CuCrO₂: Mg as transparent electrodes, we have demonstrated the approach for developing high-transmittance and low-operative-voltage THz phase shifters by electrically tuning liquid crystals (LCs). Unlike traditional indium-tin-oxide thin films, we have applied 600 nm-thick CuCrO₂: Mg thin films as transparent electrodes, and our results show that this material has great potential for THz photonics. Specifically, the transparent electrode with THz transmission of ∼92 % reveals the feasibility of CuCrO₂: Mg as a suitable material for THz photonics applications. The phase shifter scheme, which employs a ∼2.2 mm-thick cell, achieves a THz transmittance ∼70 %, a phase shift of more than 2π at 1.0 THz can be achieved even for low driving voltages of 14 V(rms). By considering the figure of merit (FOM) of LCs phase modulators defined in this work, the device based on CuCrO₂: Mg thin film shows an FOM value of 17.99; much higher than previously reported values. These results suggest that functional electrodes based on CuCrO₂: Mg thin films are promising components of THz and 6 G devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"93 ","pages":"Pages 577-583"},"PeriodicalIF":4.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168067","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}