Results in Physics最新文献

{"title":"Plasmomechanical actuation at the nanoscale activated by NIR radiation","authors":"Daniyal Khosh Maram ,&nbsp;Xavier Borrisé ,&nbsp;Joan Garcia-Garcia ,&nbsp;Xavier Cartoixà ,&nbsp;Gabriel Abadal","doi":"10.1016/j.rinp.2025.108529","DOIUrl":"10.1016/j.rinp.2025.108529","url":null,"abstract":"<div><div>The design of a plasmomechanical actuator based on an optical nanodipole antenna integrated in the overlapped free moving end of two micro-nanocantilevers is presented here. The static steady state deflection of the cantilevers, which defines the actuator response, is produced by means of two transduction phenomena activated by a continuous power NIR illumination: a desired opto-electromechanical (OEM) mechanism, in which the cantilevers are mutually attracted directly by the electrostatic force induced in the nanodipole feed gap, and a non-desired parasitic opto-thermomechanical (OTM) mechanism associated to the bimetallic effect induced by the optical heating of the structure. COMSOL Multiphysics has been chosen to carry out a design of the actuator based on an optimized optical response of the nanodipole antenna to the 1.55 μm wavelength radiation. COMSOL simulations have been also performed to evaluate the parasitic OTM response and the responsivity, defined as the OEM signal per unit radiation power. Predicted responsivity values of 0.67 nm/mW are of the same order of magnitude as in similar state-of-the-art transducers.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108529"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621557","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":"Probing entanglement dynamics in the SYK model using quantum computers","authors":"Talal Ahmed Chowdhury ,&nbsp;Kwangmin Yu ,&nbsp;Raza Sabbir Sufian","doi":"10.1016/j.rinp.2025.108526","DOIUrl":"10.1016/j.rinp.2025.108526","url":null,"abstract":"<div><div>Quantum computers are expected to be vital for exploring complex dynamics in many-body quantum systems. Thus, validating established results on current quantum computers is essential for evaluating their future utility. Hence, we investigate the entanglement entropy of the Sachdev–Ye–Kitaev (SYK) model, a paradigmatic model of quantum chaos, many-body physics, and holographic duality, in current IBM’s superconducting quantum computers. We implement optimized swap-based many-body interference protocol and randomized measurement protocol tailored for IBM quantum computers’ limited qubit connectivity. Additionally, we employ quantum multi-programming that parallelizes circuit execution to improve the results obtained by the randomized measurement protocol. Finally, by incorporating the quantum error mitigation techniques into our implementation of the entropy measurement protocols on IBM quantum hardware, we show that the current noisy quantum computer can yield results aligned with theoretical expectations, therefore affirming its capability to explore chaotic quantum dynamics in complex quantum systems.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108526"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577534","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":"Entropy generation in peristaltic transport of Al2O3 and γ-Al2O3 nanoparticles between two sinusoidally deforming curved tubes","authors":"Z. Abbas,&nbsp;A. Fayyaz,&nbsp;M.Y. Rafiq","doi":"10.1016/j.rinp.2025.108511","DOIUrl":"10.1016/j.rinp.2025.108511","url":null,"abstract":"<div><div>This work examines the peristaltic motion of <em>Al₂O₃</em> and <em>γ-Al₂O₃</em> nanofluids in curved concentric tubes with sinusoidal wall deformation. The study is important because such flows occur in medical procedures like endoscopy and catheterization, and in industrial systems with narrow curved channels. The mathematical model includes viscous dissipation in the heat transfer equation to study entropy generation. By applying the lubrication approximation under long-wavelength and low-Reynolds-number assumptions, exact analytical solutions are obtained for velocity, pressure gradient, temperature, and entropy production. The results show that velocity increases with higher flow rate and curvature, while the pressure gradient rises with larger amplitude and curvature but decreases with flow rate. The temperature profile grows with both flow rate and Brinkman number. Entropy generation increases with temperature difference but decreases when viscous dissipation is stronger. Streamline analysis shows that curvature enhances trapping near the endoscopic wall, while a higher flow rate reduces trapped boluses. The novelty of this study lies in modeling a flexible peristaltic endoscope inside a curved sinusoidal tube, which better represents the natural shape of biological organs compared to earlier straight or rigid models. The findings provide useful insight for improving nanofluid transport in both medical and engineering applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108511"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527552","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":"Characterization of commercial EJ-212 PVT scintillators as proton beam diagnostics. Luminescent study and Birks coefficients","authors":"Teresa Cebriano ,&nbsp;Jon Imanol Apiñaniz ,&nbsp;Mauricio Rico ,&nbsp;José Olivares ,&nbsp;Santanu Kumar Padhi ,&nbsp;Isabel Rodríguez Pérez ,&nbsp;Gastón García ,&nbsp;Giancarlo Gatti","doi":"10.1016/j.rinp.2025.108514","DOIUrl":"10.1016/j.rinp.2025.108514","url":null,"abstract":"<div><div>Plastic scintillators exhibit great versatility in radiation detection, making them essential diagnostic tools in numerous scientific areas. Their application in characterizing charged particle beams – whether from particle accelerators or laser-plasma interactions – is particularly common. However, the detailed processes that govern their luminescence are still being studied, primarily due to the structural complexity of the organic macro-molecules that constitute them. Moreover, precise calibration is crucial for accurately determining incident particle flux – whether from photons or charged particles – which is vital for exact dose calculations. This paper investigates the luminescent properties of the plastic scintillator EJ-212 from Eijen by irradiating it with monoenergetic pulsed proton beams using a spectrometer. The Birks coefficients, which indicate the number of luminescent photons produced per incident particle, were obtained by directly capturing the luminescence images with a CMOS camera coupled to a standard objective. Additionally, Monte Carlo simulations were conducted to evaluate the energy deposited by protons as a function of penetration depth for energies ranging from 2 to 8 MeV.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108514"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527544","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":"High-performance and energy-efficient monolayer GaTe MOSFETs for advanced semiconductor devices","authors":"Jia-Yi Li ,&nbsp;Xia-Fei Lei ,&nbsp;Yong Zhang ,&nbsp;Shi-Zhang Chen ,&nbsp;Jing Feng ,&nbsp;Xi Wu ,&nbsp;Bo Chen ,&nbsp;Feng Ning","doi":"10.1016/j.rinp.2025.108519","DOIUrl":"10.1016/j.rinp.2025.108519","url":null,"abstract":"<div><div>Two-dimensional (2D) materials have recently emerged as a pivotal force in the advancement of semiconductor technology, particularly as Moore’s law approaches its physical limits. In this study, we systematically investigated the transport properties of monolayer (ML) gallium telluride (GaTe) Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) and Tunnel Field-Effect Transistors (TFETs) with gate lengths (<em>L</em>_g) ranging from 5.1 to 9.7 nm, applying first-principles quantum transport simulations. Our results reveal that the on-state current (<em>I</em>_on) of 2D armchair-directed GaTe MOSFETs significantly exceeds the high-performance (HP) requirements of the International Technology Roadmap for Semiconductors (ITRS) by several times. Remarkably, the subthreshold swing (SS) values remain consistently below the fundamental limit of 60 mV/dec, even when the gate length is scaled down to sub-5 nm. Impressively, GaTe MOSFETs exhibit an obvious advantage over the representative 2D MoS₂, SnSe₂, InSe, and Bi₂O₂Se MOSFETs, particularly in achieving higher on-state current and lower SS at the similar technological nodes. Additionally, GaTe MOSFETs continue to satisfy the ITRS low-power (LP) application standards. It is also found that <em>n</em>-type 2D GaTe MOSFETs exhibit superior performance compared to that of TFETs. Our findings suggest that 2D GaTe can be a promising candidate in the development of high-performance, energy-efficient, and low-power ultra-scaled electronics devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108519"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527550","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":"Solving the (3+1)D Zakharov-Kuznetsov-Burgers equation using physics-informed neural networks: Lump and soliton wave dynamics in plasma","authors":"Md. Towhiduzzaman ,&nbsp;Md. Abdul Al Mohit ,&nbsp;A. Z. M Asaduzzaman","doi":"10.1016/j.rinp.2025.108512","DOIUrl":"10.1016/j.rinp.2025.108512","url":null,"abstract":"<div><div>The (3 + 1)-dimensional Zakharov-Kuznetsov-Burgers (ZKB) equation plays a pivotal role in modeling nonlinear wave propagation and dissipation phenomena in plasma dynamics. In this study, we develop a Physics-Informed Neural Network (PINN) framework tailored to accurately solve the ZKB equation with appropriate initial and boundary conditions. The proposed method successfully reconstructs lump and multi-soliton wave structures, exhibiting excellent agreement with analytical benchmarks. High-resolution 2D, 3D surface, and contour plots illustrate the dynamic evolution of nonlinear waves, while error heatmaps and training loss curves validate the model’s accuracy and stability. The PINN framework is implemented on [specify hardware, e.g., Intel i9 CPU, NVIDIA RTX GPU, 64 GB RAM], achieving efficient training times for high-dimensional computations. Moreover, potential applications in spatiotemporal structured light and coupled nonlinear systems are discussed, highlighting the broader significance of this approach in modern plasma physics and optics. This work emphasizes the robustness, efficiency, and versatility of PINNs in handling high-dimensional nonlinear partial differential equations, offering a promising computational alternative for future research in plasma physics, soliton theory, and applied mathematics.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108512"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145527496","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":"Manipulation of thermal conductivity and thermoelectric power factor via Hf-doping in FeNbSb half-Heusler alloys for enhanced thermoelectric figure of merit","authors":"Norah Alsairy ,&nbsp;A.M. Adam ,&nbsp;Z.M.H. El-Qahtani ,&nbsp;P. Petkov ,&nbsp;A. El-Khouly","doi":"10.1016/j.rinp.2025.108538","DOIUrl":"10.1016/j.rinp.2025.108538","url":null,"abstract":"<div><div>Bulk samples of FeNb_1-xHf_xSb (x = 0.0, 0.10, 0.20) alloys have been prepared by successive induction melting and mechanical alloying (MA). Electrical and thermoelectrical characteristics have been investigated as functions of temperature in the temperature range 300 to 800 K. Electrical conductivity of the parent FeNbSb alloy and the low doped FeNb_0.9Hf_0.1Sb samples showed semiconducting behaviour with smaller electrical conductivity values. On the other hand, the most doped FeNb_0.8Hf_0.2Sb alloys showed a metal-like trend. The metallic behaviour indicated that typical acoustic phonon scattering dominates the charge transfer. Thermopower measurements revealed that Seebeck coefficients increase remarkably with the temperature increasing due to Hf-doping at the studied doping range due to the remarkable effect of Hf-doping on the carrier concentration. The relationship between temperature and thermoelectric power factor was evaluated and investigated. High thermoelectric power factor was achieved at 20 µWcm⁻¹ K⁻² for the highest Hf-doped alloy. Defects and electron–phonon scatterings reduced the lattice thermal conductivity and consequently improved thermoelectric figure of merit (<em>zT</em>). <em>zT</em> has significantly increased with temperature increasing providing evidence that half-Heusler materials are promising thermoelectric options in the mid to high temperature range. In addition, it can be concluded that higher Hf-content as dopant can simultaneously optimizes enhanced power factor besides significantly reduced thermal conductivity leading to better thermoelectric figure of merit. The maximum figure of merit (<em>zT</em>) was observed for the same sample with a value of 0.17, recorded at 700 K.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108538"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615643","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":"Gain superposition and thermal management optimization in high pump power lasers using tandem Nd:MgO:LiNbO3 crystals","authors":"Chengfeng Liu,&nbsp;Xiaotian Lei,&nbsp;Liwan Wu,&nbsp;Xiaodai Yao,&nbsp;Hang Liu,&nbsp;Zijian Wang,&nbsp;Yongji Yu","doi":"10.1016/j.rinp.2025.108534","DOIUrl":"10.1016/j.rinp.2025.108534","url":null,"abstract":"<div><div>This paper presents a tandem dual Nd:MgO:LN laser system employing a dual-end thermally boosted pumping scheme to improve thermal management under high pump power conditions. Based on theoretical studies of pump reabsorption and gain superposition effects, a laser dynamical model for the dual-crystal structure is established, simulating the temporal evolution of intracavity photon density and population inversion density to optimize resonator parameters. A three-dimensional thermal conduction model further confirms that this configuration mitigates thermal effects in the gain medium. Experimentally, at an absorbed pump power of 45.05 W, the system delivers 7.59 W of single-wavelength 1084 nm output while fully suppressing 1093 nm lasing, achieving an optical-to-optical conversion efficiency of 16.85 %, and a power stability of 0.37 % (RMS). The beam quality is M² _X = 1.56 and M² _Y = 1.59. The dual-crystal tandem design addresses thermal limitations in single-crystal structures, extending the operational power range from 34.78 W to 45.05 W while maintaining stable 1084 nm emission. The gain superposition effect contributes to enhanced output power performance. This study provides an effective approach for thermal management and gain optimization in Nd:MgO:LN crystal laser systems under high pump power conditions.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108534"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621556","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":"Improving the secure transmission distance of continuous-variable quantum key distribution under limited eavesdropping using a quantum scissor","authors":"Amene Shafiee ,&nbsp;Mojtaba Golshani ,&nbsp;Mostafa Motamedifar ,&nbsp;Khatereh Jafari","doi":"10.1016/j.rinp.2025.108532","DOIUrl":"10.1016/j.rinp.2025.108532","url":null,"abstract":"<div><div>In this paper, we explore the enhancement of secure transmission distance in continuous-variable quantum key distribution (CV-QKD) under limited eavesdropping conditions by employing a quantum scissor (QS). We derive an analytical expression for the output state and demonstrate that QS significantly extends the secure communication range. Additionally, we analyze the impact of limited eavesdropping on the secret key rate, showing that restricted access to intercepted light improves security compared to an unrestricted eavesdropper scenario. To provide a comprehensive assessment, we investigate both direct and reverse reconciliation schemes. Our numerical simulations and analytical comparisons reveal that QS improves the secure transmission distance in both cases, despite reducing the secret key rate at shorter distances. The results show that QS mitigates the detrimental effects of channel loss, allowing for an extended communication range in CV-QKD systems. These findings highlight the potential of QS as a key tool for enhancing long-distance secure quantum communication in practical scenarios.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108532"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577448","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":"Investigating fission-like fragments in 208Pb(12C,x)220Ra reaction at E⋆= 39.6 and 45.4 MeV","authors":"Rupinderjeet Kaur ,&nbsp;Amanjot ,&nbsp;Priyanka ,&nbsp;Malika Kaushik ,&nbsp;Subham Kumar ,&nbsp;Arshiya Sood ,&nbsp;Yashraj Jangid ,&nbsp;Rakesh Kumar ,&nbsp;Manoj Kumar Sharma ,&nbsp;Pushpendra P. Singh","doi":"10.1016/j.rinp.2025.108504","DOIUrl":"10.1016/j.rinp.2025.108504","url":null,"abstract":"<div><div>The cross-sections of 25 fission-like fragments within the mass range 76<span><math><mo>≤</mo></math></span>A<span><math><mo>≤</mo></math></span>141, expected to be populated via fission of ²²⁰Ra in ¹²C+²⁰⁸Pb system at E<span><math><mrow><msub><mrow></mrow><mrow><mi>lab</mi></mrow></msub><mo>=</mo></mrow></math></span> 81.9 and 75.8 MeV, have been measured using offline activation analysis. The production yields of different fission-like fragments have been analyzed to generate isotopic and isobaric yield distributions. In the present work, the value of the mass dispersion parameter of fission-like fragments, <span><math><msubsup><mrow><mi>σ</mi></mrow><mrow><mi>A</mi></mrow><mrow><mn>2</mn></mrow></msubsup></math></span>, is found to be 2.93 and 2.65 for Antimony (Sb) at excitation energy E<span><math><mrow><msup><mrow></mrow><mrow><mo>⋆</mo></mrow></msup><mo>=</mo></mrow></math></span> 45.4 and 39.6 MeV, and 1.24 for Indium (In) isotope at E<span><math><mrow><msup><mrow></mrow><mrow><mo>⋆</mo></mrow></msup><mo>=</mo></mrow></math></span> 45.4 MeV. The charge dispersion parameter (<span><math><msub><mrow><mi>σ</mi></mrow><mrow><mi>Z</mi></mrow></msub></math></span>) for Sb is estimated to be 0.769 and 0.714 at E<span><math><mrow><msup><mrow></mrow><mrow><mo>⋆</mo></mrow></msup><mo>=</mo></mrow></math></span> 45.4 and 39.6 MeV, respectively. For In isotopes, the value of <span><math><msub><mrow><mi>σ</mi></mrow><mrow><mi>Z</mi></mrow></msub></math></span> is found to be 0.430 at E<span><math><mrow><msup><mrow></mrow><mrow><mo>⋆</mo></mrow></msup><mo>=</mo></mrow></math></span> 45.4 MeV. The values of mass and charge dispersion parameters for Sb and In isotopes show good agreement with those reported in the literature for similar systems. Further, the mass distribution of fission-like fragments is found to be fitted with a Gaussian function, except for a few fragments, indicating their production via compound nucleus fission. The mass variance (<span><math><msubsup><mrow><mi>σ</mi></mrow><mrow><mi>M</mi></mrow><mrow><mn>2</mn></mrow></msubsup></math></span>), obtained from the analysis of mass distributions, increases linearly with the compound nucleus excitation energy, indicating the fission-fragments mass spread with the excitation energy.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108504"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145475882","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}