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Functional Integral Representation for the S-Matrix in Integrable 2D Conformal Field Theories 二维可积共形场论中s矩阵的泛函积分表示
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700458
D. Das, G. Jorjadze, L. Megrelidze
{"title":"Functional Integral Representation for the S-Matrix in Integrable 2D Conformal Field Theories","authors":"D. Das,&nbsp;G. Jorjadze,&nbsp;L. Megrelidze","doi":"10.1134/S1068337225700458","DOIUrl":"10.1134/S1068337225700458","url":null,"abstract":"<p>We study semiclassical scattering in Liouville theory, in SL(2,R)/U(1) WZW theory and in SL(3,R) Toda theory, using the relations between the in and out fields defined by the chiral currents of these theories. By these relations we investigate the generating functional F that corresponds to the semiclassical <i>S</i>-matrix. In particular, we construct the Legendre transform of F in a closed form. The construction scheme is similar for these three theories and the obtained functionals have a compact form. This provides a basis for the functional integral representation of the <i>S</i>-matrix in these theories, which earlier was known only for Liouville theory.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"148 - 159"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236978","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
Transformation of Sodium Atoms into Magnesium in the Process of Electrolysis 电解过程中钠原子向镁的转化
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700434
R. N. Balasanyan, V. S. Arakelyan, G. R. Badalyan, I. G. Grigoryan, P. H. Muzhikyan, R. B. Kostanyan
{"title":"Transformation of Sodium Atoms into Magnesium in the Process of Electrolysis","authors":"R. N. Balasanyan,&nbsp;V. S. Arakelyan,&nbsp;G. R. Badalyan,&nbsp;I. G. Grigoryan,&nbsp;P. H. Muzhikyan,&nbsp;R. B. Kostanyan","doi":"10.1134/S1068337225700434","DOIUrl":"10.1134/S1068337225700434","url":null,"abstract":"<p>For the first time, the possibility of transforming sodium (Na) atoms into magnesium (Mg) during electrolysis was experimentally investigated. The experiments were carried out in an electrolyzer with aluminum electrodes using an aqueous solution of sodium chloride as the electrolyte. The electrolyzer was powered by electrical pulses with steep fronts. The chemical composition of the cathode surface was analyzed before and after exposure of the electrolyzer to short electrical pulses using a scanning electron microscope. As a result of the exposure, a significant accumulation of the chemical element magnesium was observed on certain areas of the aluminum cathode surface. The physical mechanism behind the appearance of the new element (Mg) is discussed.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"137 - 141"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1068337225700434.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Spectral Properties of GSAG:Ce Crystals GSAG:Ce晶体的光谱性质
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700446
T. I. Butaeva, A. V. Yeganyan
{"title":"Spectral Properties of GSAG:Ce Crystals","authors":"T. I. Butaeva,&nbsp;A. V. Yeganyan","doi":"10.1134/S1068337225700446","DOIUrl":"10.1134/S1068337225700446","url":null,"abstract":"<p>This paper discusses the optical properties of multicenter GSAG:Ce crystals grown by vertically directed crystallization and polycrystalline samples prepared by solid-state reactions. The absorption and luminescence bands of Ce<sup>3+</sup> ions in the GSAG:Ce crystal are formed by seven different activator centers. Almost half of the activator ions occupy dodecahedral sites surrounded by six octahedra occupied by Sc<sup>3+</sup> ions. The second part of Ce<sup>3+</sup> ions is surrounded by octahedra with various combinations of Sc<sup>3+</sup> ions and Al<sup>3+</sup> ions, as well as only Al<sup>3+</sup> ions. The shape of the luminescence band (∼18 700 cm<sup>–1</sup>) of Ce<sup>3+</sup> ions of GSAG:Ce crystals containing from 0.5 to 2.5 at % of the activator is stably preserved, and the emission intensity increases with increasing concentration of Ce<sup>3+</sup>.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"222 - 231"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237009","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
Second Harmonic Generation of q-Gaussian Laser Beam in Thermal Quantum Plasma 热量子等离子体中q-高斯激光束的二次谐波产生
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700574
D. Tripathi, T. Singh, A. Vijay, K. Walia
{"title":"Second Harmonic Generation of q-Gaussian Laser Beam in Thermal Quantum Plasma","authors":"D. Tripathi,&nbsp;T. Singh,&nbsp;A. Vijay,&nbsp;K. Walia","doi":"10.1134/S1068337225700574","DOIUrl":"10.1134/S1068337225700574","url":null,"abstract":"<p>Second harmonic generation of <i>q</i>-Gaussian laser beam in thermal quantum plasma is investigated in present communication. There is production of transverse gradients of intensity in relativistic plasma due to self-focusing of main beam. These intensity gradients cause electron plasma wave excitation at frequency of main beam. The interaction of excited electron plasma wave with main beam generates 2nd harmonics. Nonlinear differential equation denoting behavior of beam waist of main beam and 2nd harmonics efficiency are derived by using paraxial theory. These equations are numerically solved for investigating impact of usual parameters of laser, plasma along with quantum contribution on beam waist and efficiency of 2nd harmonics. Comparison of current study is also done with cold quantum plasma and classical relativistic plasma cases.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"171 - 180"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236980","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
On the Divergence and Profile of the Beam of the LUE-75 Linear Electron Accelerator Operating at the AANL (YerPhi) LUE-75直线电子加速器光束散度和剖面的研究
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700495
A. S. Hakobyan, L. R. Vahradyan, L. A. Poghosyan, T. V. Kotanjyan, H. H. Marukyan
{"title":"On the Divergence and Profile of the Beam of the LUE-75 Linear Electron Accelerator Operating at the AANL (YerPhi)","authors":"A. S. Hakobyan,&nbsp;L. R. Vahradyan,&nbsp;L. A. Poghosyan,&nbsp;T. V. Kotanjyan,&nbsp;H. H. Marukyan","doi":"10.1134/S1068337225700495","DOIUrl":"10.1134/S1068337225700495","url":null,"abstract":"<p>The calculated and measured angular divergences and profiles of the electron beam of the LUE-75 linear electron accelerator, operating at the A.I. Alikhanyan National Science Laboratory, are presented. The results were obtained at various energies and target distances at the exit of the vacuum chamber. The installation of a remotely controlled scanner and network cameras enables visual computer monitoring and precise positioning of the irradiated sample.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"121 - 130"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237012","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
Comparison of Various Feynman Diagram Calculation Methods for the Decay b → sγ b→sγ衰变各种费曼图计算方法的比较
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700422
H. H. Asatryan
{"title":"Comparison of Various Feynman Diagram Calculation Methods for the Decay b → sγ","authors":"H. H. Asatryan","doi":"10.1134/S1068337225700422","DOIUrl":"10.1134/S1068337225700422","url":null,"abstract":"<p>In recent works, the full set of three-loop diagrams (of order <span>(alpha _{s}^{2})</span>) associated with the current-current operators <i>O</i><sub>1</sub> and <i>O</i><sub>2</sub> contributing to the decay amplitude for <i>b</i> → <i>s</i>γ were calculated. In this paper, one pair of these diagrams is calculated at various values of the charm-quark mass <i>m</i><sub><i>c</i></sub> using different methods, and the numerical accuracy/ease of use of these methods are compared to the analytic results obtained by others. Using the programs AMFlow and DiffExp to solve the differential equations for the master integrals, precise numerical results were obtained across a range of charm-quark mass values. In addition, asymptotic and Taylor series expansions were performed around <i>z</i> = <span>({{m_{c}^{2}} mathord{left/ {vphantom {{m_{c}^{2}} {m_{b}^{2}}}} right. kern-0em} {m_{b}^{2}}})</span> = 0 and <i>z</i> = 1/10, respectively. A fully numerical evaluation of the master integrals using PySecDec was also carried out.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"131 - 136"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237013","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
An Approach to Applying CT Reconstruction Algorithms to Numerically Synthesized Objects for the Analysis of 3D-Printed Samples 应用CT重建算法对数值合成物体进行3d打印样品分析的方法
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700562
A. V. Shahverdyan, V. V. Margaryan, Yu. M. Cherepennikov, K. G. Trouni, S. N. Noreyan, A. M. Mamyan, R. K. Mirzoyan, H. H. Samsonyan, V. R. Kocharyan
{"title":"An Approach to Applying CT Reconstruction Algorithms to Numerically Synthesized Objects for the Analysis of 3D-Printed Samples","authors":"A. V. Shahverdyan,&nbsp;V. V. Margaryan,&nbsp;Yu. M. Cherepennikov,&nbsp;K. G. Trouni,&nbsp;S. N. Noreyan,&nbsp;A. M. Mamyan,&nbsp;R. K. Mirzoyan,&nbsp;H. H. Samsonyan,&nbsp;V. R. Kocharyan","doi":"10.1134/S1068337225700562","DOIUrl":"10.1134/S1068337225700562","url":null,"abstract":"<p>In this study, we present an algorithm for simulating CT images of diverse 3D-printed samples, allowing for a comparison between simulated and real CT experiment results. The use of computer simulation enhances the understanding of the CT imaging process and aids in the development and validation of reconstruction algorithms. It is demonstrated that such an algorithm potentially may be useful for analysis of inaccuracies of real 3D-printed samples under CT investigation and can distinguish these details from filling model of these samples.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"232 - 237"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237080","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
Elliptically Polarized High Laser Harmonics in the Hexagonal Graphene Quantum Dot 六方石墨烯量子点中的椭圆偏振高激光谐波
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700483
A. G. Ghazaryan, N. O. Arustamyan, G. H. Chopuryan, Kh. V. Sedrakyan
{"title":"Elliptically Polarized High Laser Harmonics in the Hexagonal Graphene Quantum Dot","authors":"A. G. Ghazaryan,&nbsp;N. O. Arustamyan,&nbsp;G. H. Chopuryan,&nbsp;Kh. V. Sedrakyan","doi":"10.1134/S1068337225700483","DOIUrl":"10.1134/S1068337225700483","url":null,"abstract":"<p>In this paper, we studied the transformation of light in a hexagonal graphene quantum dot during the generation of high harmonics in an intense laser field. A linearly polarized laser field leads to intense emission of elliptically polarized harmonics. The ellipticity and orientation of the polarization ellipse are derived from the Stokes parameters calculated, considering various polarization components. Numerical results show that the ellipticity of harmonics generated in a quantum dot can be easily tuned by changing the tilt angle of a linearly polarized laser pulse without complex control systems.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"160 - 165"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237011","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
Temperature Dependence of AC Conductivity in Lithium-Doped Zinc Oxide Films 掺锂氧化锌薄膜交流电导率的温度依赖性
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-10-07 DOI: 10.1134/S1068337225700501
R. K. Hovsepyan, N. R. Aghamalyan, A. A. Arakelyan, T. A. Vartanyan, Y. A. Kafadaryan, V. G. Lazaryan, H. G. Mnatsakanyan, S. I. Petrosyan, A. R. Poghosyan
{"title":"Temperature Dependence of AC Conductivity in Lithium-Doped Zinc Oxide Films","authors":"R. K. Hovsepyan,&nbsp;N. R. Aghamalyan,&nbsp;A. A. Arakelyan,&nbsp;T. A. Vartanyan,&nbsp;Y. A. Kafadaryan,&nbsp;V. G. Lazaryan,&nbsp;H. G. Mnatsakanyan,&nbsp;S. I. Petrosyan,&nbsp;A. R. Poghosyan","doi":"10.1134/S1068337225700501","DOIUrl":"10.1134/S1068337225700501","url":null,"abstract":"<p>The mechanisms of charge carrier transport for alternating current in zinc oxide (ZnO) films with Li impurity, which creates acceptor and donor centers, are determined. A comparative study of the applicability of two models, quantum mechanical tunneling (QMT) and correlated barrier hopping (CBH), is carried out to interpret experimental data on alternating current electrical conductivity. Based on the analysis of the temperature dependence of conductivity at different frequencies, a choice was made in favor of the CBH model. The dependence of the thermal activation energy of conductivity on the concentration of the doping impurity Li in ZnO films is studied. It is established that the Meyer–Neldel rule, which relates the pre-exponential factor in the temperature dependence of alternating current conductivity to the activation energy, is fulfilled for compensated semiconductors in which donor and acceptor centers exist simultaneously.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"195 - 201"},"PeriodicalIF":0.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236983","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
Nonlinear Dynamics of q-Gaussian Laser Beam in Collisional Plasma: Effect of Linear Absorption q-高斯激光束在碰撞等离子体中的非线性动力学：线性吸收的影响
IF 0.4 4区 物理与天体物理
Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2025-07-04 DOI: 10.1134/S1068337225700409
D. Tripathi, S. Kaur, A. Vijay, K. Walia
{"title":"Nonlinear Dynamics of q-Gaussian Laser Beam in Collisional Plasma: Effect of Linear Absorption","authors":"D. Tripathi,&nbsp;S. Kaur,&nbsp;A. Vijay,&nbsp;K. Walia","doi":"10.1134/S1068337225700409","DOIUrl":"10.1134/S1068337225700409","url":null,"abstract":"<p>The present research investigates nonlinear dynamics of q-Gaussian laser beam in Collisional Plasma considering the influence of linear absorption. In Collisional plasma, redistribution of carriers occurs as a result of non-uniform heating thereby creating density gradients inside plasma leading to beam’s self-focusing. The Paraxial ray approximation is used for obtaining the nonlinear differential equation for spot size of laser beam. The numerical solution of this differential equation is obtained by well-known Runge–Kutta 4th order method to explore the behavior of beam waist with normalized propagation distance. Effect of change in laser-plasma parameters such as beam intensity, plasma density, beam radius, absorption coefficient and q-values on beam waist of laser beam is also analyzed.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 1","pages":"16 - 23"},"PeriodicalIF":0.4,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161893","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
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