IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-03-21 DOI: 10.1007/s12043-025-02894-8

Abu Mohamed Alhasan, Salah Abdul rhmann

{"title":"Statistical measures on digital phase generation and transmission through alkali-metal vapours: a tutorial study","authors":"Abu Mohamed Alhasan, Salah Abdul rhmann","doi":"10.1007/s12043-025-02894-8","DOIUrl":"10.1007/s12043-025-02894-8","url":null,"abstract":"<div>This paper explores the statistical measure features of digital phase transfer among multilevel atoms, such as alkali metals with hyperfine structures. The excitation fields constitute a train of probe pulses and a single drive field. We have provided two schemes for the mechanism of excitation dynamics. In the first scheme, the pulses are frequency swept across the upper hyperfine splitting of the excited atomic states. In the second scheme, the pulses are tuned to the upper hyperfine level with a high angular momentum, allowing strong absorption of pulses. The phases of the propagating pulses are rectangular shapes with well-separated boundaries, especially in the second scheme. We address the notion of phase entropy to study the influence of sweeping on the statistics of the generated phases and select definite phases with desired features. The estimated phase entropy exposes local maximum entropy and minimum entropy. In the second scheme, we have extended the pulses in time. Therefore, the phase distributions are rich. The features of the digital distributions of rectangular phases have not been obtained manually. We have addressed math criteria to distinguish the digital phase’s features across propagation. Randomness tests and randomness generation have been evaluated on the time-dependent discrete phase sequences. We expect the proposed generation and transmission of randomised discrete phases to be used in quantum applications.</div>","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668355","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}

引用次数: 0

Entrance channel-dependent compound nucleus formation probability of heavy nuclei 依赖入口通道的重核复合核形成概率

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-03-19 DOI: 10.1007/s12043-025-02900-z

H S Anushree, S Shubha, H C Manjunatha, N Sowmya

{"title":"Entrance channel-dependent compound nucleus formation probability of heavy nuclei","authors":"H S Anushree, S Shubha, H C Manjunatha, N Sowmya","doi":"10.1007/s12043-025-02900-z","DOIUrl":"10.1007/s12043-025-02900-z","url":null,"abstract":"<div>Compound nucleus (CN) formation probability ((P_{textrm{CN}})) is essential for synthesising superheavy elements (SHEs), understanding nuclear reactions, predicting reaction outcomes and designing efficient experiments. High (P_{textrm{CN}}) indicates a greater likelihood of successful fusion, aiding in the study of nuclear stability and structure. An empirical formula for (P_{textrm{CN}}) has been proposed, incorporating new parameters such as effective fissility ((chi _{textrm{eff}})) and zeta parameter ((zeta )), along with excitation energy and fusion barrier height. The fitted function shows greater systematic behaviour for ((E^*-V_B)chi _{textrm{eff}}) and (zeta ^{0.02}). (P_{textrm{CN}}) values obtained align well with the experimental data, predicting outcomes for both successful and unsuccessful fusion reactions. Notably, larger (P_{textrm{CN}}) values are seen for (phantom {a}^{45}hbox {Sc}{+}^{249}hbox {Cf}) and (phantom {a}^{50}hbox {Ti}{+}^{249}hbox {Bk}) for (Z=119) and 120, respectively. Analysis identifies (phantom {a}^{80}hbox {Se}{+}^{210}hbox {At}) and (phantom {a}^{55}hbox {Mn}{+}^{241}hbox {Pu}) as potential reactions for synthesising the SHE ((Z=119)), with Mn projectiles showing higher (P_{textrm{CN}}) than Se projectiles due to lower (zeta ) and deformation effects. Hence, (phantom {a}^{55}hbox {Mn}{+}^{241}hbox {Pu}) is more promising than (phantom {a}^{80}hbox {Se}{+}^{210}hbox {At}) for this purpose. The present work is useful for focussing experimental efforts and increasing the efficiency of SHE research by focussing on reactions with higher CN formation probability.</div>","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645544","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}

引用次数: 0

Non-classical properties of coherent light interacting with two harmonic modes coupled through the angular momentum 通过角动量耦合的两个谐波模与相干光相互作用的非经典性质

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-03-17 DOI: 10.1007/s12043-025-02896-6

Kartick Chandra Saha, Dolan Krishna Bayen, Swapan Mandal

{"title":"Non-classical properties of coherent light interacting with two harmonic modes coupled through the angular momentum","authors":"Kartick Chandra Saha, Dolan Krishna Bayen, Swapan Mandal","doi":"10.1007/s12043-025-02896-6","DOIUrl":"10.1007/s12043-025-02896-6","url":null,"abstract":"<div>The dynamical solutions of two quantised harmonic modes coupled through the angular momentum are used to study the photon antibunching (PA) and the amplitude squared squeezing (ASS) of the input coherent radiation field interacting with the said coupled two oscillators. The analytical closed-form expressions for the PA and the ASS are exhibited. The complicated nature of the exact analytical solutions are on the way of extracting good physics. Therefore, the parametric estimates for the ASS and the PA are exhibited. A small algebra shows that the coupling parameter is of two parts. One of the two parts is responsible for the quantum optical properties of the input radiation field. Interestingly, the PA is obtained even when both the harmonic modes are in vacuum. It substantiates the fact that the coupling parameter induces nonlinearity and hence the photons are generated out of the vacuum. The data chosen for the symbolic calculations are theoretical in nature. Of course, these data are quite consistent with those of the theoretical developments. Apart from the academic interests of the present investigation, it is possible to plan a real experiment to verify the analytical results.</div>","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638533","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}

引用次数: 0

The dynamic analysis of the complex negative-order Ablowitz–Kaup–Newell–Segur equation using the localised wave structures 基于局域波结构的复杂负阶ablowitz - kap - newwell - segur方程动力学分析

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-03-17 DOI: 10.1007/s12043-024-02890-4

Kai-Hong Yao, Xiao-Yong Wen

引用次数: 0

Gravity-driven thermally stratified nanofluid flow past a permeable stretching surface 重力驱动的热分层纳米流体流过可渗透的拉伸表面

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-03-12 DOI: 10.1007/s12043-025-02895-7

Saheb Konai, Swati Mukhopadhyay

引用次数: 0

Charged relativistic model utilising embedding condition and quadratic equation of state 利用嵌入条件和二次状态方程的带电相对论模型

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-03-12 DOI: 10.1007/s12043-025-02898-4

Alberto K Mathias, Avirt S Lighuda

引用次数: 0

Heat and mass transfer analysis for thin film lubricated flow of microbe-infused viscoelastic nanofluid 微生物注入粘弹性纳米流体薄膜润滑流动的传热传质分析

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-03-01 DOI: 10.1007/s12043-025-02892-w

Manzoor Ahmad, Mudassir Arif, Sami Ullah Khan, Adnan, Arshad Riaz, Ahmed S Sowayan

{"title":"Heat and mass transfer analysis for thin film lubricated flow of microbe-infused viscoelastic nanofluid","authors":"Manzoor Ahmad, Mudassir Arif, Sami Ullah Khan,  Adnan, Arshad Riaz, Ahmed S Sowayan","doi":"10.1007/s12043-025-02892-w","DOIUrl":"10.1007/s12043-025-02892-w","url":null,"abstract":"<div>Non-Newtonian materials are suggested as lubricants to maintain the high performances of various mechanical and industrial processes. Viscoelastic fluids as lubricants improve the mechanical and thermal processes. The objective of the current analysis is to highlight the significance of power-law viscoelastic lubricant in the flow of Walters B nanofluid in a moving frame. The role of higher-order slip as an interfacial constraint is studied for the lubrication phenomenon. Walters B nanofluid flow is a stagnation point flow. The Buongiorno nanofluid model is used to study the Brownian motion and thermophoresis size-dependent effects. The analysis is further updated by incorporating the bioconvective phenomenon with suspension of microbes. After modelling the problem successfully, it is shown that problem involved higher-order velocity slip conditions for which numerical computations cannot be performed. In order to treat such problems, an updated semi-analytical scheme called the hybrid homotopy analysis method (HHAM) is employed. Key focus is on the physical aspect of parameters. Current results have applications in polymers, lubrications, thermal systems, chemical processes, extrusion systems, etc.</div>","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521644","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}

引用次数: 0

Lump wave, breather wave and other abundant wave solutions to the (2 + 1)-dimensional Sawada–Kotera–Kadomtsev Petviashvili equation of fluid mechanics （2 + 1）维流体力学Sawada-Kotera-Kadomtsev Petviashvili方程的块状波、呼吸波和其他丰富波解

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-02-26 DOI: 10.1007/s12043-024-02884-2

Kang-Jia Wang, Hong-Wei Zhu, Feng Shi, Xiao-Lian Liu, Guo-Dong Wang, Geng Li

{"title":"Lump wave, breather wave and other abundant wave solutions to the (2 + 1)-dimensional Sawada–Kotera–Kadomtsev Petviashvili equation of fluid mechanics","authors":"Kang-Jia Wang, Hong-Wei Zhu, Feng Shi, Xiao-Lian Liu, Guo-Dong Wang, Geng Li","doi":"10.1007/s12043-024-02884-2","DOIUrl":"10.1007/s12043-024-02884-2","url":null,"abstract":"<div>The (2 + 1)-dimensional Sawada–Kotera–Kadomtsev Petviashvili equation (SKKPe) is explored in this work. Wielding the Hopf–Cole transform, its Hirota bilinear form is developed. Then, the lump wave solutions of the bright-type and dark-type, and the breather wave solutions of the sin–cosh type are extracted by applying the Hirota bilinear method with symbolic computation by taking different test functions. Additionally, abundant travelling wave solutions like the bright wave, periodic wave and singular wave solutions are investigated by employing three effective approaches, namely the extend Wang’s direct mapping method II (EWDMM), Bernoulli sub-equation function method (BSEFM) and Kudryashov method (KM). The nonlinear physical characteristics of the attained solutions are displayed graphically using the 3D and 2D plots. To the best of the author's knowledge, the results presented in the article are entirely new and have not been presented elsewhere, which can augment the exact solutions of the considered equation and allow us to study its nonlinear dynamics better.</div>","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496721","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}

引用次数: 0

Enhanced UV and IR filtering with PMMA(/)perylene-coated FTO glass for energy-efficient luminescent solar concentrator windows 利用PMMA (/)聚苯乙烯涂层FTO玻璃增强紫外和红外过滤，用于节能发光太阳能聚光器窗口

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-02-21 DOI: 10.1007/s12043-024-02889-x

S M El-Bashir, W A Almotery, A M Aldhafiri, A M El-Naggar

{"title":"Enhanced UV and IR filtering with PMMA(/)perylene-coated FTO glass for energy-efficient luminescent solar concentrator windows","authors":"S M El-Bashir, W A Almotery, A M Aldhafiri, A M El-Naggar","doi":"10.1007/s12043-024-02889-x","DOIUrl":"10.1007/s12043-024-02889-x","url":null,"abstract":"Luminescent solar concentrator (LSC) windows have been made by the solvent casting of polymethyl methacrylate(/)chloroform solutions doped with different concentrations of perylene yellow dyestuffs (KREMER 94700). The effect of dye concentration on the structure and spectral photophysical properties was studied using field emission scanning electron microscope (FE-SEM), energy-disperse analysis X-ray (EDAX), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, optical absorption, fluorescence spectroscopy and chromaticity diagram (CIE 1931). The fluorescence intensity was the highest when the film has 5 × 10−3 wt% doping concentration. This film showed the best long-pass optical filter properties in the 200–535 nm band. In addition, it has high transmittance (∑75%), which is considered promising in ultraviolet (UV) protective window applications. Another important application is establishing infrared (IR) filtering windows based on fluorine-doped tin oxide (FTO) glass spin-coated with the proposed LSC windows. The optical properties of these spectrally selective LSC windows were optimised to significantly reduce harmful solar radiation and enhance energy efficiency for building-integrated photovoltaics, aligning with Saudi Arabia's Vision 2030 goals for sustainable urban development and renewable energy integration.","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455534","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}

引用次数: 0

Viscous damping of r-modes and emission of gravitational waves r-模态的粘性阻尼与引力波的发射

IF 1.9 4区物理与天体物理

Pramana Pub Date : 2025-02-20 DOI: 10.1007/s12043-025-02897-5

Debasis Atta, D N Basu

引用次数: 0

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