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Central European Journal of Physics最新文献

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Solution of the Dirac equation with magnetic monopole and pseudoscalar potentials 具有磁单极子和伪标量势的狄拉克方程的解
Central European Journal of Physics Pub Date : 2014-03-11 DOI: 10.2478/s11534-014-0447-x
S. Aghaei, A. Chenaghlou
{"title":"Solution of the Dirac equation with magnetic monopole and pseudoscalar potentials","authors":"S. Aghaei, A. Chenaghlou","doi":"10.2478/s11534-014-0447-x","DOIUrl":"https://doi.org/10.2478/s11534-014-0447-x","url":null,"abstract":"AbstractThe Dirac equation in the presence of the Dirac magnetic monopole potential, the Aharonov-Bohm potential, a Coulomb potential and a pseudo-scalar potential, is solved by separation of variables using the spinweighted spherical harmonics. The energy spectrum and the form of the spinor functions are obtained. It is shown that the number j in spin-weighted spherical harmonics must be greater than $$left| q right| - tfrac{1}\u0000{2}$$.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"64 1","pages":"266-273"},"PeriodicalIF":0.0,"publicationDate":"2014-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87456760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A relativistic wave equation with a local kinetic operator and an energy-dependent effective interaction for the study of hadronic systems 强子系统研究中具有局部动力学算符和能量依赖有效相互作用的相对论波动方程
Central European Journal of Physics Pub Date : 2014-03-10 DOI: 10.2478/s11534-014-0444-0
M. Sanctis
{"title":"A relativistic wave equation with a local kinetic operator and an energy-dependent effective interaction for the study of hadronic systems","authors":"M. Sanctis","doi":"10.2478/s11534-014-0444-0","DOIUrl":"https://doi.org/10.2478/s11534-014-0444-0","url":null,"abstract":"We study a fully relativistic, two-body, quadratic wave equation for equal mass interacting particles. With this equation the difficulties related to the use of the square roots in the kinetic energy operators are avoided. An energy-dependent effective interaction, also containing quadratic potential operators, is introduced. For pedagogical reasons, it is previously shown that a similar procedure can be also applied to the well-known case of a one-particle Dirac equation. The relationships of our model with other relativistic approaches are briefly discussed. We show that it is possible to write our equation in a covariant form in any reference frame. A generalization is performed to the case of two particles with different mass. We consider some cases of potentials for which analytic solutions can be obtained. We also study a general numerical procedure for solving our equation taking into account the energy-dependent character of the effective interaction. Hadronic physics represents the most relevant field of application of the present model. For this reason we perform, as an example, specific calculations to study the charmonium spectrum. The results show that the adopted equation is able to reproduce with good accuracy the experimental data.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"40 1","pages":"221-232"},"PeriodicalIF":0.0,"publicationDate":"2014-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73262929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The one-dimensional Hulthén potential in the quantum phase space representation 量子相空间表示中的一维hulthsamn势
Central European Journal of Physics Pub Date : 2014-02-15 DOI: 10.2478/s11534-014-0433-3
J. Stanek
{"title":"The one-dimensional Hulthén potential in the quantum phase space representation","authors":"J. Stanek","doi":"10.2478/s11534-014-0433-3","DOIUrl":"https://doi.org/10.2478/s11534-014-0433-3","url":null,"abstract":"The analytic expression of the Wigner function for bound eigenstates of the Hulthén potential in quantum phase space is obtained and presented by plotting this function for a few quantum states. In addition, the correct marginal distributions of the Wigner function in spherical coordinates are determined analytically.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"8 1","pages":"90-96"},"PeriodicalIF":0.0,"publicationDate":"2014-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75489721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The separation of TM and TE wave in multi-layer metamaterial structure 多层超材料结构中TM和TE波的分离
Central European Journal of Physics Pub Date : 2014-02-15 DOI: 10.2478/s11534-014-0425-3
Lijuan Xia, G. Yu, Qian Wang
{"title":"The separation of TM and TE wave in multi-layer metamaterial structure","authors":"Lijuan Xia, G. Yu, Qian Wang","doi":"10.2478/s11534-014-0425-3","DOIUrl":"https://doi.org/10.2478/s11534-014-0425-3","url":null,"abstract":"A mixed-structure form of one-dimensional metamaterial structure composed of single negative permittivity material and anisotropic metamaterial has been investigated in this paper. Such a multi-layer metamaterial structure constitutes special resonant structures, which can be used to control wave propagation and realize the complete separation of TM and TE wave by choosing specific parameters. Theoretical analysis and numerical calculations have been performed to confirm the above results. Specifically, augments in incident angles of TM and TE waves make complete transmission frequencies right shift, and the thicknesses of this resonant structure determine propagation modes and propagation frequencies.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"98 1","pages":"141-146"},"PeriodicalIF":0.0,"publicationDate":"2014-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76538553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Jacobi collocation approximation for nonlinear coupled viscous Burgers’ equation 非线性耦合粘性Burgers方程的Jacobi搭配近似
Central European Journal of Physics Pub Date : 2014-02-15 DOI: 10.2478/s11534-014-0429-z
E. H. Doha, A. Bhrawy, M. Abdelkawy, R. Hafez
{"title":"A Jacobi collocation approximation for nonlinear coupled viscous Burgers’ equation","authors":"E. H. Doha, A. Bhrawy, M. Abdelkawy, R. Hafez","doi":"10.2478/s11534-014-0429-z","DOIUrl":"https://doi.org/10.2478/s11534-014-0429-z","url":null,"abstract":"This article presents a numerical approximation of the initial-boundary nonlinear coupled viscous Burgers’ equation based on spectral methods. A Jacobi-Gauss-Lobatto collocation (J-GL-C) scheme in combination with the implicit Runge-Kutta-Nyström (IRKN) scheme are employed to obtain highly accurate approximations to the mentioned problem. This J-GL-C method, based on Jacobi polynomials and Gauss-Lobatto quadrature integration, reduces solving the nonlinear coupled viscous Burgers’ equation to a system of nonlinear ordinary differential equation which is far easier to solve. The given examples show, by selecting relatively few J-GL-C points, the accuracy of the approximations and the utility of the approach over other analytical or numerical methods. The illustrative examples demonstrate the accuracy, efficiency, and versatility of the proposed algorithm.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"3 1","pages":"111-122"},"PeriodicalIF":0.0,"publicationDate":"2014-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86785963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
An alternative solution of diatomic molecules 双原子分子的替代溶液
Central European Journal of Physics Pub Date : 2014-02-15 DOI: 10.2478/s11534-014-0423-5
Özgür Öztemel, E. Olğar
{"title":"An alternative solution of diatomic molecules","authors":"Özgür Öztemel, E. Olğar","doi":"10.2478/s11534-014-0423-5","DOIUrl":"https://doi.org/10.2478/s11534-014-0423-5","url":null,"abstract":"The spectrum of r−1 and r−2 type potentials of diatomic molecules in radial Schrödinger equation are calculated by using the formalism of asymptotic iteration method. The alternative method is used to solve eigenvalues and eigenfunctions of Mie potential, Kratzer-Fues potential, Coulomb potential, and Pseudoharmonic potential by determining the α, β, γ and σ parameters.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"16 1","pages":"103-110"},"PeriodicalIF":0.0,"publicationDate":"2014-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77176783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Time-dependent density functional theory molecular dynamics simulation of doubly charged uracil in gas phase 时变密度泛函理论双荷尿嘧啶气相分子动力学模拟
Central European Journal of Physics Pub Date : 2014-02-15 DOI: 10.2478/s11534-014-0428-0
P. López-Tarifa, M. Hervé du Penhoat, Rodophe Vuilleumier, M. Gaigeot, U. Rothlisberger, I. Tavernelli, A. Le Padellec, J. Champeaux, M. Alcamí, P. Moretto-Capelle, F. Martín, M. Politis
{"title":"Time-dependent density functional theory molecular dynamics simulation of doubly charged uracil in gas phase","authors":"P. López-Tarifa, M. Hervé du Penhoat, Rodophe Vuilleumier, M. Gaigeot, U. Rothlisberger, I. Tavernelli, A. Le Padellec, J. Champeaux, M. Alcamí, P. Moretto-Capelle, F. Martín, M. Politis","doi":"10.2478/s11534-014-0428-0","DOIUrl":"https://doi.org/10.2478/s11534-014-0428-0","url":null,"abstract":"We use time-dependent density functional theory and Born-Oppenheimer molecular dynamics methods to investigate the fragmentation of doubly ionized uracil in gas phase. Different initial electronic excited states of the dication are obtained by removing electrons from different inner-shell orbitals of the neutral species. We show that shape-equivalent orbitals lead to very different fragmentation patterns revealing the importance of the intramolecular chemical environment. The results are in good agreement with ionion coincidence measurements of uracil collision with 100 keV protons.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"30 1","pages":"97-102"},"PeriodicalIF":0.0,"publicationDate":"2014-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86715949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Inhibition of methicillin resistant Staphylococcus aureus by a plasma needle 血浆针对耐甲氧西林金黄色葡萄球菌的抑制作用
Central European Journal of Physics Pub Date : 2014-02-13 DOI: 10.2478/s11534-014-0437-z
M. Miletic, D. Vuković, Irena Živanović, I. Dakić, I. Soldatovic, D. Maletić, S. Lazović, G. Malović, Z. Petrović, N. Puač
{"title":"Inhibition of methicillin resistant Staphylococcus aureus by a plasma needle","authors":"M. Miletic, D. Vuković, Irena Živanović, I. Dakić, I. Soldatovic, D. Maletić, S. Lazović, G. Malović, Z. Petrović, N. Puač","doi":"10.2478/s11534-014-0437-z","DOIUrl":"https://doi.org/10.2478/s11534-014-0437-z","url":null,"abstract":"In numerous recent papers plasma chemistry of non equilibrium plasma sources operating at atmospheric pressure has been linked to plasma medical effects including sterilization. In this paper we present a study of the effectiveness of an atmospheric pressure plasma source, known as plasma needle, in inhibition of the growth of biofilm produced by methicillin resistant Staphylococcus aureus (MRSA). Even at the lowest powers the biofilms formed by inoculi of MRSA of 104 and 105 CFU have been strongly affected by plasma and growth in biofilms was inhibited. The eradication of the already formed biofilm was not achieved and it is required to go to more effective sources.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"118 1","pages":"160-167"},"PeriodicalIF":0.0,"publicationDate":"2014-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75770262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Nonequilibrium model on Archimedean lattices 阿基米德格上的非平衡模型
Central European Journal of Physics Pub Date : 2014-02-11 DOI: 10.2478/s11534-014-0435-1
F. Lima
{"title":"Nonequilibrium model on Archimedean lattices","authors":"F. Lima","doi":"10.2478/s11534-014-0435-1","DOIUrl":"https://doi.org/10.2478/s11534-014-0435-1","url":null,"abstract":"On (4, 6, 12) and (4, 82) Archimedean lattices, the critical properties of the majority-vote model are considered and studied using the Glauber transition rate proposed by Kwak et al. [Kwak et al., Phys. Rev. E, 75, 061110 (2007)] rather than the traditional majority-vote with noise [Oliveira, J. Stat. Phys. 66, 273 (1992)]. We obtain Tc and the critical exponents for this Glauber rate from extensive Monte Carlo studies and finite size scaling. The calculated values of the critical temperatures and Binder cumulant are Tc = 0.651(3) and U4* = 0.612(5), and Tc = 0.667(2) and U4* = 0.613(5), for (4, 6, 12) and (4, 82) lattices respectively, while the exponent (ratios) β/ν, γ/ν and 1/ν are respectively: 0.105(8), 1.48(11) and 1.16(5) for (4, 6, 12); and 0.113(2), 1.60(4) and 0.84(6) for (4, 82) lattices. The usual Ising model and the majority-vote model on previously studied regular lattices or complex networks differ from our new results.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"27 1","pages":"185-191"},"PeriodicalIF":0.0,"publicationDate":"2014-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74737486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Stability characteristic of hypersonic flow over a blunt wedge under freestream pulse wave 自由流脉冲波作用下钝楔型高超声速流动的稳定性特性
Central European Journal of Physics Pub Date : 2014-02-02 DOI: 10.2478/s11534-014-0421-7
Xiaojun Tang, H. Lv, X. Meng, Zhenqing Wang, Q. Lv
{"title":"Stability characteristic of hypersonic flow over a blunt wedge under freestream pulse wave","authors":"Xiaojun Tang, H. Lv, X. Meng, Zhenqing Wang, Q. Lv","doi":"10.2478/s11534-014-0421-7","DOIUrl":"https://doi.org/10.2478/s11534-014-0421-7","url":null,"abstract":"To investigate the stability characteristic of hypersonic flow under the action of a freestream pulse wave, a high-order finite difference method was employed to do direction numerical simulation (DNS) of hypersonic unsteady flow over an 8° half-wedge-angle blunt wedge with freestream slow acoustic wave. The evolution of disturbance wave modes in the boundary layer under a pulse wave and a continuous wave are compared, and the wall temperature effect on the hypersonic boundary layer stability for a pulse wave disturbance is discussed. Results show that, both for a pulse wave and a continuous wave in freestream, the disturbance waves inside the nose boundary layer are mainly a fundamental mode; the Fourier amplitude of pressure disturbance mode in the boundary layer for a pulse wave is far less than that for a continuous wave, and the band frequency of the former is wider than that of the latter. All disturbance modes decay rapidly along the streamwise in the nose boundary layer. In the non-nose boundary layer, the dominant mode is transferred from fundamental mode into second harmonic. The transformation of dominant mode for a pulse wave appears much earlier than that for a continuous wave. Different frequency disturbance modes present different changes along streamline in the boundary layer, and the frequency band narrows around the second harmonic mode along the streamwise. Keen competition and the transformation of energy exist among different modes in the boundary layer. Wall temperature modifies the stability characteristic of the hypersonic boundary layer, which presents little effect on the development of fundamental modes and cooling wall could accelerates the growth of the high frequency mode as well as the dominant mode transformation.","PeriodicalId":50985,"journal":{"name":"Central European Journal of Physics","volume":"81 1","pages":"17-31"},"PeriodicalIF":0.0,"publicationDate":"2014-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76849120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
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