Chinese Journal of Physics最新文献_第3页

Influence of Majorana bound states on conductance characteristics in a T-shaped quantum dot molecule 马约拉纳束缚态对t形量子点分子电导特性的影响

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-26 DOI: 10.1016/j.cjph.2025.03.042

Zelong He , Muhammad Aslam , Seyede Zahra Naeimi , M. Shahid , Sergey Nikiforov , Muhammad Khalid Hussain , Alma Dauletbekova , Hussain Ahmad , Anees Ur Rehman

{"title":"Influence of Majorana bound states on conductance characteristics in a T-shaped quantum dot molecule","authors":"Zelong He , Muhammad Aslam , Seyede Zahra Naeimi , M. Shahid , Sergey Nikiforov , Muhammad Khalid Hussain , Alma Dauletbekova , Hussain Ahmad , Anees Ur Rehman","doi":"10.1016/j.cjph.2025.03.042","DOIUrl":"10.1016/j.cjph.2025.03.042","url":null,"abstract":"<div><div>Quantum dots (QDs) in contact with normal-metal and superconducting leads exhibit remarkable electron transmission features. The coupling of Majorana bound states (MBSs) has made them a promising platform for the development of mesoscopic structures. To elaborate on the highly efficient mesoscopic mode, the Andreev conductance in a T-shaped QD molecule coupled with MBSs is theoretically addressed. As the QD-MBS coupling strength λ is focused with respect to the QD energy level <span><math><mrow><msub><mrow><mi>ε</mi></mrow><mn>1</mn></msub><mo>=</mo><msub><mrow><mi>ε</mi></mrow><mn>2</mn></msub><mo>=</mo><mn>0</mn></mrow></math></span> in a T-shaped QD molecule, the conductance peak at <span><math><mrow><msub><mrow><mi>ε</mi></mrow><mi>F</mi></msub><mo>=</mo><mn>0</mn></mrow></math></span> rises up to 0.5<span><math><mrow><msup><mrow><mi>e</mi></mrow><mn>2</mn></msup><mo>/</mo><mi>h</mi></mrow></math></span>. At <span><math><mrow><msub><mrow><mi>ε</mi></mrow><mn>1</mn></msub><mo>=</mo><msub><mrow><mi>ε</mi></mrow><mn>2</mn></msub><mo>=</mo><mn>0</mn></mrow></math></span>, the bonding and antibonding states are captured in the conductance lines as suitable QD-MBS or MBS-MBS coupling <span><math><msub><mrow><mi>ε</mi></mrow><mi>M</mi></msub></math></span> survives. Furthermore, for the asymmetric QD-lead coupling case, changing <span><math><msub><mrow><mi>ε</mi></mrow><mi>M</mi></msub></math></span> not only induces a transition in zero bias peaks but also suppresses the conductance curve in a low critical bias regime. The present findings can deepen the understanding of the influence of MBSs on electron transport features, highlighting the potential of T-shaped QD molecules coupled with MBSs for additional development and applications in mini-sized devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 627-637"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760380","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}

引用次数: 0

Quantifying the environment's temperature effect on gene expression: Lyapunov exponent and multifractal dimension approach 量化环境温度对基因表达的影响：李亚普诺夫指数和多分形维度方法

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-26 DOI: 10.1016/j.cjph.2025.02.041

F. Nemati, S. Behnia

引用次数: 0

An improved cuckoo search algorithm for inverse heat conduction and heat convection 一种改进的逆向热传导和热对流的布谷鸟搜索算法

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-26 DOI: 10.1016/j.cjph.2025.03.039

Xiyan Tian , Bingbing Yang , Xin Na , Shuaishuai Cheng , Liankang Ba , Yi Yuan

{"title":"An improved cuckoo search algorithm for inverse heat conduction and heat convection","authors":"Xiyan Tian , Bingbing Yang , Xin Na , Shuaishuai Cheng , Liankang Ba , Yi Yuan","doi":"10.1016/j.cjph.2025.03.039","DOIUrl":"10.1016/j.cjph.2025.03.039","url":null,"abstract":"<div><div>A competitive improved mode of cuckoo search algorithm (CSA) named step enhanced cuckoo search algorithm (SECSA) in terms of enhanced search step length is proposed to solve inverse heat transfer problems (IHTPs) in the present research. In SECSA, a traction factor is introduced and hence the global and local search is balanced. Further, an adjustment strategy is suggested, to adaptive step size scaling factor and adaptive discovery probability. It is optimized to constrain the randomness of the original algorithm, strengthen the information exchange between populations, and improve computational efficiency and robustness. Therefore the performance of the original CSA is improved. SECSA along with collocation spectral method (CSM) is utilized to solve conduction and convective inverse heat transfer problem (IHTP) of reconstructing boundary conditions, optimizing thermophysical parameters as well as identifying the heat flux, in both cylindrical coordinate and in Cartesian coordinate. For the irregular regions, body fitted coordinate transformation technique is adopted to transform the irregular regions into the regular ones, based on the theory of adaptive coordinate transformation and the regularization of complex variable functions. Results are analyzed both qualitatively and quantitatively in the considerations of population quantity, expansion degree and number of measuring points. The statistical results show the potential performance of improved CSs in IHTPs. The convergence speed, calculation accuracy and universality are significantly improved.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 765-789"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817577","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}

引用次数: 0

Manipulation and control of rotary photon drag in a chiral quantum dot molecular system 手性量子点分子系统中旋转光子拖拽的操纵与控制

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-25 DOI: 10.1016/j.cjph.2025.03.026

Muhammad Idrees , Fazal Badshah , Rashid Ali , Khurram Shehzad , Zareen A. Khan

{"title":"Manipulation and control of rotary photon drag in a chiral quantum dot molecular system","authors":"Muhammad Idrees , Fazal Badshah , Rashid Ali , Khurram Shehzad , Zareen A. Khan","doi":"10.1016/j.cjph.2025.03.026","DOIUrl":"10.1016/j.cjph.2025.03.026","url":null,"abstract":"<div><div>This study investigates the manipulation and control of rotary photon drag in a chiral quantum dot molecular system. The system comprises two laterally coupled (In,Ga)As/GaAs quantum dots with distinct band configurations. The results demonstrate the ability to manipulate and control the rotary photon drag of both left-circularly polarized (LCP) and right-circularly polarized (RCP) beams, due to strong chirality induced by electromagnetic fields. Notably, considerable enhancements in rotary photon drag are observed, with values ranging from <span><math><mrow><mo>±</mo><mn>20</mn></mrow></math></span> rad to <span><math><mrow><mo>±</mo><mn>40</mn></mrow></math></span> rad for RCP and LCP beams, respectively. Additionally, the study highlights strong manipulation of the group index, divergence angle, and refractive index in these chiral quantum dot molecular systems. The group index is enhanced from <span><math><mrow><mo>±</mo><mn>4</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>11</mn></mrow></msup></mrow></math></span> to <span><math><mrow><mo>±</mo><mn>6</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>11</mn></mrow></msup></mrow></math></span> for both RCP and LCP beams. Furthermore, a maximum divergence angle of <span><math><mrow><mn>3</mn><mo>.</mo><mn>4</mn></mrow></math></span> rad is observed between the RCP and LCP beams, along with enhanced refractive indices for both polarization states. The enhanced rotary photon drag facilitates precision optical manipulation, chiral sensing, advanced optical communication, and quantum information processing. This work also shows potential for enhancing light-matter interactions in photonic devices, advancing next-generation photonic circuits and sensors.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 866-876"},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852058","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}

引用次数: 0

Heterogeneous and homogeneous extreme multistability in a dual-memristor FHN circuit considering magnetic and electric field effects 考虑磁场和电场效应的双忆阻FHN电路的非均匀和均匀极端多稳定性

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-24 DOI: 10.1016/j.cjph.2025.03.033

Yongjie Zhu , Rui Liang , Guangzhe Zhao , Xiaoyun Wang , Yunzhen Zhang

{"title":"Heterogeneous and homogeneous extreme multistability in a dual-memristor FHN circuit considering magnetic and electric field effects","authors":"Yongjie Zhu , Rui Liang , Guangzhe Zhao , Xiaoyun Wang , Yunzhen Zhang","doi":"10.1016/j.cjph.2025.03.033","DOIUrl":"10.1016/j.cjph.2025.03.033","url":null,"abstract":"<div><div>The memristor-based neuron circuit considering the magnetic field effect is prone to heterogeneous extreme multistability (EM). However, the electric field effect represented by a charge-controlled memristor can also act on the neuron circuit, causing unusual nonlinear phenomena. To reveal the dynamical effects of magnetic and electric fields on biological neurons, this study proposes a novel non-autonomous dual-memristor FHN circuit considering magnetic and electric field effects. It is achieved by introducing a charge-controlled memristor representing the electric field effect into a single-memristor FHN circuit that considers only the magnetic field effect. The dual-memristor FHN circuit not only emerges the heterogeneous EM dependent on the initial states of the two memristors, but also presents the homogeneous EM whose dynamics can be boosted by the initial state offset of the charge-controlled memristor. The initial state-related bifurcation behaviors are numerically revealed, and the mechanism of homogeneous EM is theoretically interpreted. Further, a flux-charge model dependent on initial state parameters is established by feat of the incremental integral reconstruction, and then the initial state parameters-related stability and bifurcation behaviors are elaborated. Finally, digital implementations based on FPGA platform are provided to confirm the numerical simulations.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 714-730"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791628","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}

引用次数: 0

Study on the photoelectric properties of series heterojunctions based on g-GaN 基于g-GaN的串联异质结光电特性研究

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-22 DOI: 10.1016/j.cjph.2025.03.031

Xiangfeng Qi , Enling Li , Yang Shen , Ke Qin , Xiaoyu Zhao , Deming Ma , Zhen Cui

{"title":"Study on the photoelectric properties of series heterojunctions based on g-GaN","authors":"Xiangfeng Qi , Enling Li , Yang Shen , Ke Qin , Xiaoyu Zhao , Deming Ma , Zhen Cui","doi":"10.1016/j.cjph.2025.03.031","DOIUrl":"10.1016/j.cjph.2025.03.031","url":null,"abstract":"<div><div>The series heterojunctions such as the GeC/GaN, SiC/GaN, and ZnO/GaN heterojunctions, MoS<sub>2</sub>/GaN, MoSe<sub>2</sub>/GaN, MoSSe/GaN, WS<sub>2</sub>/GaN, WSe<sub>2</sub>/GaN, and WSSe/GaN heterojunctions are designed and systematically researched based on first-principles calculations, and the electronic properties and photocurrent characteristics are studied in this paper. The results indicate that the band gaps of the heterojunctions are larger than those of the individual monolayers, except for the SiC/GaN heterojunction. The results of Crystal Orbital Hamilton Population (COHP) and Integrated COHP reveal the bonding states in each heterojunction, the Ga-N bonds in the atomic structures play a dominant role in stabilizing the heterojunctions. The final photodetector simulation results show that the photocurrent peaks of the MoS<sub>2</sub>/GaN, MoSSe/GaN and WSe<sub>2</sub>/GaN heterojunctions exceed 0.1<span><math><msubsup><mi>a</mi><mn>0</mn><mn>2</mn></msubsup></math></span>/photon. Notably, the MoSSe/GaN heterojunction exhibits a high Extinction Ratio (8.202) and a remarkable photocurrent peak (2.610<span><math><msubsup><mi>a</mi><mn>0</mn><mn>2</mn></msubsup></math></span>/photon), indicating that the MoSSe/GaN heterojunction is a promising candidate for novel photodetector.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 890-901"},"PeriodicalIF":4.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864231","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}

引用次数: 0

Effects of electromagnetic induction on vibrational resonance in fast spiking Izhikevich neuronal systems 电磁感应对快速尖峰Izhikevich神经元系统振动共振的影响

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-21 DOI: 10.1016/j.cjph.2025.03.019

Zhaoxue Huang , Kaijun Wu , Meijuan He , Jiawei Li

引用次数: 0

Competition between stationary and oscillatory thermocapillary convection of a Cattaneo–Christov fluid over a thick wall with finite thermal conductivity 热导率有限的厚壁Cattaneo-Christov流体的静止和振荡热毛细对流的竞争

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-21 DOI: 10.1016/j.cjph.2025.03.010

J. Antonio Ruiz-Díaz, Luis A. Dávalos-Orozco

引用次数: 0

Quantum calculus approaches to Ostrowski-type inequalities for strongly n-polynomial convex functions with applications in quantum physics 强n多项式凸函数的ostrowski型不等式的量子微积分方法及其在量子物理中的应用

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-21 DOI: 10.1016/j.cjph.2025.03.013

Humaira Kalsoom , Bandar Almohsen

{"title":"Quantum calculus approaches to Ostrowski-type inequalities for strongly n-polynomial convex functions with applications in quantum physics","authors":"Humaira Kalsoom , Bandar Almohsen","doi":"10.1016/j.cjph.2025.03.013","DOIUrl":"10.1016/j.cjph.2025.03.013","url":null,"abstract":"<div><div>This article aims to establish a new generalization of <span><math><mi>q</mi></math></span>-Ostrowski-type inequalities within the class of strongly <span><math><mi>n</mi></math></span>-polynomial convex functions by utilizing quantum calculus techniques, such as <span><math><mrow><msub><mrow></mrow><mrow><mi>a</mi></mrow></msub><msub><mrow><mi>D</mi></mrow><mrow><mi>q</mi></mrow></msub></mrow></math></span>- and <span><math><mrow><msup><mrow></mrow><mrow><mi>b</mi></mrow></msup><msub><mrow><mi>D</mi></mrow><mrow><mi>q</mi></mrow></msub></mrow></math></span>-derivatives, as well as <span><math><msub><mrow><mi>q</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span>- and <span><math><msup><mrow><mi>q</mi></mrow><mrow><mi>b</mi></mrow></msup></math></span>-integrals. To improve the accuracy of these bounds, we utilize several mathematical quantum inequalities, including <span><math><mi>q</mi></math></span>-Hölder’s inequality and the <span><math><mi>q</mi></math></span>-power mean inequality. We derive some special cases from our main results and reproduce known results under specific conditions. The paper emphasizes the significance of these inequalities by presenting detailed examples and graphical representations. These examples demonstrate their practical applications and validate the theoretical findings. Moreover, these inequalities have significant applications in statistical physics, where they contribute to refining entropy inequalities and thermodynamic bounds.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 508-528"},"PeriodicalIF":4.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738792","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}

引用次数: 0

Stability and quadruple solution dynamics of unsteady ternary hybrid nanofluid flow over a stretching/shrinking wedge 非定常三元混合纳米流体在拉伸/收缩楔上流动的稳定性和四解动力学

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2025-03-20 DOI: 10.1016/j.cjph.2025.03.014

Yun Ouyang , Md Faisal Md Basir , Kohilavani Naganthran , Ioan Pop

{"title":"Stability and quadruple solution dynamics of unsteady ternary hybrid nanofluid flow over a stretching/shrinking wedge","authors":"Yun Ouyang , Md Faisal Md Basir , Kohilavani Naganthran , Ioan Pop","doi":"10.1016/j.cjph.2025.03.014","DOIUrl":"10.1016/j.cjph.2025.03.014","url":null,"abstract":"<div><div>The stability analysis of quadruple solutions in unsteady ternary hybrid nanofluid flow past a stretching/shrinking wedge is conducted to optimize boundary layer characteristics, enhancing heat transfer and reducing thermal resistance. Based on an industrial process, the mathematical model determines critical values for first–second and third–fourth solutions using the BVP4C function in MATLAB. Key parameters, including the unsteadiness parameter, stretching/shrinking parameter, wedge parameter, suction/injection, and hybridity, influence flow dynamics, and heat transfer, with validation confirming alignment with previous studies. The skin friction coefficient and Nusselt number increase for a shrinking wedge with higher unsteadiness, nanofluid type, and suction/injection. The first and third solutions are stable, while the others are not. At a stretching/shrinking parameter of -9 and a nanoparticle volume fraction of 0.04, the ternary nanofluid achieves 0.28% higher thermal efficiency than the binary nanofluid, which exceeds the mono-nanofluid by 0.59%. The novelty of this study lies in identifying quadruple solutions and their critical values for none, two, and quadruple solutions, contributing to advancements in slit die extrusion engineering and heat exchanger applications.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 558-572"},"PeriodicalIF":4.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746879","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}

引用次数: 0