Indian Journal of Physics最新文献

{"title":"Binding energy of excitons in quantum wells with embedded series of thin tunnel-transparent barriers","authors":"M. P. Telenkov,&nbsp;P. F. Kartsev,&nbsp;P. S. Klemmer,&nbsp;Yu. A. Mityagin,&nbsp;K. K. Nagaraja","doi":"10.1007/s12648-025-03635-8","DOIUrl":"10.1007/s12648-025-03635-8","url":null,"abstract":"<div><p>We present the results of modelling the behaviour of excitons in quantum wells with thin tunnel-transparent barriers built into their volume. A nonmonotonic dependence of the binding energy of excitons on the degree of filling of the quantum well with barriers was discovered. At first, the binding energy increases, but as the number of barriers increases, it begins to decrease.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4091 - 4094"},"PeriodicalIF":1.7,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A quantum algorithm for the linear response of nuclei","authors":"Nifeeya Singh,&nbsp; Abhishek,&nbsp;P. Arumugam","doi":"10.1007/s12648-025-03627-8","DOIUrl":"10.1007/s12648-025-03627-8","url":null,"abstract":"<div><p>We present a quantum algorithm to obtain the response of the atomic nucleus to a small external electromagnetic perturbation. For the first time, such an algorithm is implemented on quantum computers to obtain the Giant Dipole Resonance cross-sections in nuclei and corroborated with experimental data. The Hamiltonian of the system is represented by a mean field with a separable interaction. For the quantum computation, we utilize the Jordan-Wigner (JW) transformation and one hot encoding for the operators and basis, respectively. Apart from getting the eigenstates of the Hamiltonian (performed in most of the quantum simulations), we utilize them further in calculating the dipole response. The results for ¹²⁰Sn and ²⁰⁸Pb are analyzed along with classical computing involving linear response theory, showing good agreement with available data. We also present the results in the presence of hardware noise and employ noise mitigation techniques. We quantify the circuit depth, width, and number of gates to encode the states and perform other required calculations in quantum circuits. While bringing out the feasibility of utilizing quantum algorithms in accurately modeling nuclear response, this study underscores the need for more efforts to explore situations where the quantum simulations might outperform other methods.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4367 - 4377"},"PeriodicalIF":1.7,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Effect of flow pattern and channel cross section on thermal management of cylindrical batteries with solid blocks containing liquid channels","authors":"Abolfazl Mokhtari,&nbsp;Meysam Jalalvand","doi":"10.1007/s12648-025-03630-z","DOIUrl":"10.1007/s12648-025-03630-z","url":null,"abstract":"<div><p>The escalating prevalence of electric vehicles in industrial and military applications is driven by factors such as reduced environmental impact through lower emissions (air pollution and noise) and the inherent advantages of high power density and low maintenance requirements. Lithium-ion batteries, as the primary energy source for these vehicles, are critically susceptible to elevated operating temperatures, which significantly compromises their performance and can lead to premature failure. Effective thermal management systems are thus imperative to ensure optimal battery operation. This study investigates a thermal management strategy utilizing solid blocks incorporating liquid coolant channels. The research comprehensively examines the influence of channel cross-sectional geometry (rectangular and square) and flow patterns (parallel and counter-flow) on thermal performance and pressure drop across a range of discharge rates. Key performance indicators include the maximum temperature within the battery module and the temperature differential across the module. The findings demonstrate that counter-flow configurations consistently exhibit lower peak temperatures compared to parallel-flow arrangements. Notably, the rectangular channel with counter-flow achieved the lowest maximum temperature of 38.47 °C at the highest discharge rate (3C) investigated. Furthermore, counter-flow systems exhibited significantly lower temperature differentials within the battery module. The channel with a square section can record the lowest pressure drop, which is about 1.8 pa less pressure drop in the counter flow pattern than the parallel one and it is equal to 66.25 pa. For instance, at a 3C discharge rate, the temperature difference across the module in the rectangular channel was 7.1 °C for parallel flow and 2.12 °C for counter-flow, respectively. The analysis also revealed that square channels with counter-flow configurations generally exhibited lower pressure drops. In summary, rectangular channels achieved the highest hydrothermal performance (η) in both flow patterns, with values of 1.23 for parallel flow and 1.3 for counter-flow.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4223 - 4238"},"PeriodicalIF":1.7,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Extreme multistability of different order chaotic systems: discrete and continuous","authors":"Mohammad Ali Khan,&nbsp;Joydev Ghosh,&nbsp;Syeda Darakhshan Jabeen","doi":"10.1007/s12648-025-03608-x","DOIUrl":"10.1007/s12648-025-03608-x","url":null,"abstract":"<div><p>In this paper, we propose a scheme for designing extreme multistable synchronized systems by coupling two distinct chaotic systems of different dimensions. Such coupling configurations exhibit synchronized chaos in the system. In other words, the synchronized state is sensitively dependent on the initial conditions. This kind of synchronization is an example of extreme multistable synchronization. To achieve an extreme multistable system we introduce a new conjecture by choosing the controllers in such a way that all state variables maintain the constant difference. Furthermore, we demonstrate the applicability of our scheme in coupled chaotic systems modeled as 3D and 4D chaotic systems respectively. Finally, we show that extreme multistable synchronization can be achieved in coupled 1D Ricker maps. Simulation results are provided to validate the efficiency and effectiveness of our proposed scheme.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4339 - 4348"},"PeriodicalIF":1.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Noise effects on perceptual choice in the attention model of binocular rivalry","authors":"Shengying Zhuge,&nbsp;Jian Li,&nbsp;Haimeng Sun,&nbsp;Jiawei Zhou,&nbsp;Ruyin Chen","doi":"10.1007/s12648-025-03624-x","DOIUrl":"10.1007/s12648-025-03624-x","url":null,"abstract":"<div><p>Binocular rivalry is a cyclic process involving perceptual choice and dominance duration, commonly intertwined with attention and noise. Recent work primarily emphasized potential functional role of noise during perceptual dominance duration stage, while overlooking its impact on perceptual choice. Here, the attention model of binocular rivalry subjected to multiplicative and additive noises was investigated. The numerical results revealed that the noise plays a crucial role in the perceptual choice. (i) Formation of perceptual choice was accompanied by differences in binocular relaxation time, with the relaxation time of dominant perception being longer than that of non-dominant perception. In addition, there exists a correlation between mean perceptual choice time and relaxation time. (ii) The observation of coherence resonance induced by the additive noise indicates that binocular perceptions can achieve the most stable perceptual choice. (iii) The attention bias caused by binocular fluctuation difference can lead to perceptual choice preference, with the most significant perceptual choice preference being associated with occurrence of the resonance excitation and suppression. These findings have the important implication for a deeper understanding of binocular rivalry and decision-making.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4021 - 4034"},"PeriodicalIF":1.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Effect of minimal length formalism on alpha decay half-life","authors":"J. L. Adjaba,&nbsp;J. M. Ema’a Ema’a,&nbsp;V. P. Ndzono,&nbsp;P. Mah Tsila,&nbsp;G. H. Ben-Bolie","doi":"10.1007/s12648-025-03615-y","DOIUrl":"10.1007/s12648-025-03615-y","url":null,"abstract":"<div><p>In this paper, we study the effect of minimal length formalism on the alpha decay process. We use the deformed Heisenberg uncertainty principle in Schrödinger equation and determine a novel expression of half-life using the Wentzel-Kramers-Brillouin (WKB) method. The effect of minimal length on alpha decay half-lives is studied using tables and figures. The results show the appearance of a correction factor on the probability of tunneling through the coulomb barrier. We compare our results with and without the minimum length again experimental data taken from the literature. We found that our results are in better agreement with the experimental data when we take into account this formalism.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4357 - 4365"},"PeriodicalIF":1.7,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Mixed metal oxides derived from carbonate intercalated Mg−Al layered double hydroxide: role of the calcination on modifying the optical, electrical and dielectric properties","authors":"K. Ben Zarouala,&nbsp;W. Elhatimi,&nbsp;O. Rhalmi,&nbsp;Y. Chaali,&nbsp;R. Lahkale,&nbsp;Y. Messak,&nbsp;E. Sabbar","doi":"10.1007/s12648-025-03621-0","DOIUrl":"10.1007/s12648-025-03621-0","url":null,"abstract":"<div><p>This work focuses on a comparative study of the electrical, dielectric and optical properties of a layered double hydroxide (LDH) and its mixed metal oxide derivatives (MMOs). The LDH precursor was synthesized by intercalation of carbonate ions, while the MMOs were prepared by calcining LDH at 500 and 900 °C, designated MMO 500 and MMO 900, respectively. LDH and its two derived MMOs were characterized by X-ray diffraction and thermogravimetric analysis, and analyzed by two spectroscopic techniques: diffuse reflectance and impedance spectroscopy. It was found that the structural refinement of MMO 900 by the Rietveld method revealed the presence of a majority magnesium oxide phase and a significant percentage of MgAl₂O₄ spinel. The analysis of the electrical response of the materials leads to the establishment of an equivalent electrical circuit, the parameters of which are reported and discussed. It was found the role of calcination on decreasing the electrical conductivity, dielectric constant and improving the dielectric properties by reducing the dielectric energy dissipation. However, the calcination of the LDH precursor does not result in enhanced light absorption but rather facilitates improvements in light reflection and dielectric behavior. The results of this study indicate that MMO 900 has potential applications in developing innovative dielectric reflective materials.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"3791 - 3803"},"PeriodicalIF":1.7,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Development of dual-emitting Sb3+/Eu3+ codoped CaTiO3 phosphors for energy-efficient white LEDs","authors":"M. Nitesh Kumar,&nbsp;K. Muralidaran,&nbsp;P. Samuel","doi":"10.1007/s12648-025-03636-7","DOIUrl":"10.1007/s12648-025-03636-7","url":null,"abstract":"<div><p>Dual-emitting phosphors have emerged as a promising class of materials due to their ability to produce multiple emissions from a single host, offering enhanced efficiency and reducing the potential of compatibility problems with different color combination materials. Considering this, CaTiO₃ powders doped with Sb³⁺ and Sb³⁺/ Eu³⁺ were synthesized by high temperature solid state reaction method and subjected to various characterization studies such as X-ray diffraction, FTIR, SEM, EDX, UV–Vis DRS and PL. Diffraction patterns confirmed the orthorhombic nature of all the samples without any significant impact due to doping. FTIR studies showed dominant Ca–O and Ti–O vibrations whereas DRS spectra revealed the absorption nature of corresponding dopant ions. Bandgap values, estimated from the absorption spectra match well with the standard energy gap of the host matrix. SEM coupled with EDX showed near spherical particles with all the chemical elements distributed uniformly. From the emission studies, we determined the optimum Sb³⁺ concentration to be 2% for blue emitting Sb³⁺ doped CaTiO₃ whereas for codoped, optimum Eu³⁺ concentration was found to be 4% with the maximum red emission. Under UV excitation of 252 nm, codoped samples had a dual emission in blue and red wavelength regions corresponding to both the dopant ions (Sb³⁺, Eu³⁺). Eu³⁺ emission is enhanced with the addition of sensitizer Sb³⁺ ions due to the energy transfer between Sb³⁺ and Eu³⁺. CIE chromaticity and CCT parameters for the codoped phosphors revealed the white color emission from the prepared powders, making them suitable candidate for white light emitting diodes (WLEDs).</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4095 - 4107"},"PeriodicalIF":1.7,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Periodic pressure waves and transmembrane wavefronts in an electromechanical nerve model","authors":"Nkeh Oma Nfor,&nbsp;Alain Moise Dikandé","doi":"10.1007/s12648-025-03609-w","DOIUrl":"10.1007/s12648-025-03609-w","url":null,"abstract":"<div><p>We show that axoplasmic pressure waves governed by the improved Heimburg–Jackson hydrodynamic equation evolve as periodic soliton pulses, in which the membrane capacitance effectively ensures the coupling between transmembrane voltage (modeled by the modified Hodgkin–Huxley cable equation) and the pressure waves. Time independent wavefronts that serve as steady state solutions of the transmembrane voltage are analytically obtained, with it threshold values vital in determining wavefronts propagation in the entire nerve fiber. An increase in numerical value of the membrane coupling coefficient generally decrease the amplitude and speed of the propagating electromechanical wavefronts, thereby leading to the effective control of neuronal information and other mechanosensory processes. This work finds application in the field of anesthetics because the amplitude and speed of propagating wavefronts which transmit pain, can be controlled by varying the parameters of the system.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 11","pages":"4327 - 4338"},"PeriodicalIF":1.7,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"An overdamped univariate system subjected to spatiotemporal noise in the frame of Fokker–Planck equation","authors":"Ying Sun,&nbsp;Linru Nie","doi":"10.1007/s12648-025-03626-9","DOIUrl":"10.1007/s12648-025-03626-9","url":null,"abstract":"<div><p>For previous research on stochastic dynamics, investigators focused mainly on systems subjected to temporal noise, and established the Fokker–Planck equation (FPE) corresponding to the Langevin equation describing them. In fact, numerous systems driven by spatiotemporal noise exist across biology, physics, chemistry, and related fields. This study analytically investigates an overdamped univariate spatiotemporal system subjected to spatiotemporal noise in the frame of FPE. First, we employ the Taylor expansion of the spatiotemporal <span>(delta)</span> function to derive the Kramers–Moyal equation. Subsequently, based on the Langevin equation which describes dynamical behavior of the system, the nth-order transition moment of state variable of the system is calculated to acquire the corresponding FPE for the overdamped univariate spatiotemporal stochastic system. Finally, using monostable and bistable systems subjected to spatiotemporal noise as illustrative cases, we demonstrate that their steady state probability distribution functions obtained from the spatiotemporal FPE agree with numerical solutions of the corresponding spatiotemporal Langevin equations, thereby validating the spatiotemporal FPE’s correctness. This research result not only provides an important tool for investigating analytically the systems subjected to the spatiotemporal noise, but also improves further the current stochastic dynamical theories.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"99 10","pages":"4013 - 4019"},"PeriodicalIF":1.7,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}