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匹配条件: “ Sergej Skosyrski” ,找到相关结果约189条。
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Perturbative and non-perturbative aspects of QED_{3}
Moroz, Sergej
High Energy Physics - Phenomenology , 2007,
Abstract: In this work we review various findings in the planar quantum physics with the special emphasis on the two-component quantum electrodynamics in three-dimensional spacetime (QED_{3}) with the Chern-Simons (CS) term. First the classical electrodynamics is briefly outlined. Then we construct and classify the unitary irreducible representations of the Poincare group and connect them to various covariant fields. Subtleties with discrete symmetries arising in QED_{3} are also discussed. Quantization of the free gauge field with and without the CS term is performed in Coulomb gauge. Subsequently we discuss the ultraviolet behavior of the theory in perturbative regime and perform some one-loop calculations. The induced CS term is examined using the effective action formalism. The non-relativistic electron-electron interactions are considered in the Maxwell-Chern-Simons theory and the possibility of bound states is briefly discussed. We also examine the non-relativistic scattering of two anyons in the pure CS theory to one-loop order.
Gender and religiosity
Flere Sergej
Sociologija , 2002, DOI: 10.2298/soc0203255f
Abstract: In the paper, the author deals with the relationship between gender and frequency of (ir)religiosity. Bearing in mind that the finding of more frequent religiosity of women is almost universal within Christianity, various psychological and sociological explanations are presented and dealt with. In the latter part of the paper, the author presents empirical survey data from Slovenia. The longitudinal analysis of correlation of gender and religiosity does not indicate any trend, though fluctuations are detected. A two step cross tabulation of education, gender and religiosity points to a minimal possibility of explanation by lower education among females. Regression analysis indicates that social variables remain robust, when gender is introduced into the model. It is concluded that factors of a sociological nature cannot explain the full difference in religiosity among males and females and that psychological factors immanent to gender should be taken into account.
Religious capital and religious rewards: A study in the economics of religious life
Flere Sergej
Panoeconomicus , 2012, DOI: 10.2298/pan1201117f
Abstract: Religious life is studied by way suggested by the rational choice theory and the religious capital theory. The basic contentions of the theory on the nature of religious life having to do with an exchange upon a religious market, by firms offering compensators and rewards, and consumers, is considered. In the empirical analysis, it was validated that the independent (religious capital) and dependent (religious rewards of two types) were empirically separate constructs. Cross-sectional analysis of survey data indicated a very strong association between religious capital and institutional and ritual experience rewards within religious life, at a cross-cultural analysis, including Bosnian Muslims, Serbian Orthodox, Slovenian Catholics and US Protestants. The association was confirmed as robust at regression inspection with religious socialization. This extends further support for the empirical validity these novel theories of religious life and extensions of economic analysis into religious life.
“The Thing Itself” Ironic Hermeneutics of the Subject in King Lear
Sergej Macura
Trans : Revue de Littérature Générale et Comparée , 2009,
Abstract: Cet article examine le processus de “connaissance de soi” conduit par le protagoniste principal de la pièce de Shakespeare, Le Roi Lear, à travers les dialogues du personnage éponyme avec les interlocuteurs divers de la pièce – les membres de sa famille, ses domestiques, ses camarades de souffrance sur la lande, mais aussi les forces de la nature. Son savoir le plus profond dérive de sa rencontre avec Edgar, déguisé en “pauvre Tom”, alors que Lear finalement devient fou, après avoir compris la misère qu’il s’est fait subir à lui-même. The paper discusses the process of self-knowing experienced by the main character in King Lear, through the self-deposed King’s dialogues with various protagonists of the play – his closest relatives, his servants, fellow-sufferers on the heath and even the forces of nature. His deepest knowledge comes from the encounter with Edgar in the disguise of Poor Tom, when his reason finally gives way before he can realize what he has done to himself. Este artículo examina el proceso de “conocimiento de sí” que vive el protagonista de la obra de Shakespeare El Rey Lear, mediante los diálogos del personaje epónimo con distintos interlocutores de la obra (los miembros de su familia, sus domésticos, sus compa eros de sufrimiento en la landa, así como las fuerzas de la naturaleza. Su saber más profundo nace del encuentro con Edgar, disfrazado de “pobre Tom”, que tiene lugar en el momento en que Lear acaba por volverse loco, después de darse cuenta de lo que se hizo vivir a si mismo.
Religious processes as intercultural interaction: Contours of a sociological discourse
Lebedev Sergej
Filozofija i Dru?tvo , 2009, DOI: 10.2298/fid0901037l
Abstract: During 'cyclic' historical periods it would be correct to interpret religious processes in terms of interaction of two essentially different, but substantially, structurally and functionally comparative types of integrating cultural complexes that, in historical perspective, compete with each other on the effect on individuals and society in general. Such complexes represent secular and religious culture. Contemporary socio-cultural situation can be defined as an asymmetric representativeness of both secular and religious cultures. In a modern secular society, dominance of a secular culture over a religious one can be manifested in three basic dimensions: substantial, regulative and subjective ones. Secular culture is adopted during the primary socialization process. However, religious culture is still adopted through conscious, voluntary selection in younger or more mature age. It may be possible to determine two basic attitudes of the contemporary ('secularized') man towards religion. The first attitude may be called 'reversive' and the other one 'conversive'.
Below the Breitenlohner-Freedman bound in the nonrelativistic AdS/CFT correspondence
Sergej Moroz
Physics , 2009, DOI: 10.1103/PhysRevD.81.066002
Abstract: We propose that there is no analogue of the Breitenlohner-Freedman stability bound on the mass of a scalar field in the context of the nonrelativistic AdS/CFT correspondence. Our treatment is based on an equivalence between the field equation of a complex scalar in the AdS/CFT correspondence and the one-dimensional Schroedinger equation with an inverse square potential. We compute the two-point boundary correlation function for m^2
Tangent Bifurcation of Band Edge Plane Waves, Dynamical Symmetry Breaking and Vibrational Localization
Sergej Flach
Physics , 1995, DOI: 10.1016/0167-2789(95)00267-7
Abstract: We study tangent bifurcation of band edge plane waves in nonlinear Hamiltonian lattices. The lattice is translationally invariant. We argue for the breaking of permutational symmetry by the new bifurcated periodic orbits. The case of two coupled oscillators is considered as an example for the perturbation analysis, where the symmetry breaking can be traced using Poincare maps. Next we consider a lattice and derive the dependence of the bifurcation energy on the parameters of the Hamiltonian function in the limit of large system sizes. A necessary condition for the occurence of the bifurcation is the repelling of the band edge plane wave's frequency from the linear spectrum with increasing energy. We conclude that the bifurcated orbits will consequently exponentially localize in the configurational space.
Obtaining Breathers in Nonlinear Hamiltonian Lattices
Sergej Flach
Physics , 1995, DOI: 10.1103/PhysRevE.51.3579
Abstract: We present a numerical method for obtaining high-accuracy numerical solutions of spatially localized time-periodic excitations on a nonlinear Hamiltonian lattice. We compare these results with analytical considerations of the spatial decay. We show that nonlinear contributions have to be considered, and obtain very good agreement between the latter and the numerical results. We discuss further applications of the method and results.
Perturbative and non-perturbative aspects of QED_{3}
Sergej Moroz
Physics , 2007,
Abstract: In this work we review various findings in the planar quantum physics with the special emphasis on the two-component quantum electrodynamics in three-dimensional spacetime (QED_{3}) with the Chern-Simons (CS) term. First the classical electrodynamics is briefly outlined. Then we construct and classify the unitary irreducible representations of the Poincare group and connect them to various covariant fields. Subtleties with discrete symmetries arising in QED_{3} are also discussed. Quantization of the free gauge field with and without the CS term is performed in Coulomb gauge. Subsequently we discuss the ultraviolet behavior of the theory in perturbative regime and perform some one-loop calculations. The induced CS term is examined using the effective action formalism. The non-relativistic electron-electron interactions are considered in the Maxwell-Chern-Simons theory and the possibility of bound states is briefly discussed. We also examine the non-relativistic scattering of two anyons in the pure CS theory to one-loop order.
Nonlinear Lattice Waves in Random Potentials
Sergej Flach
Physics , 2014, DOI: 10.1007/978-3-319-19015-0_1
Abstract: Localization of waves by disorder is a fundamental physical problem encompassing a diverse spectrum of theoretical, experimental and numerical studies in the context of metal-insulator transition, quantum Hall effect, light propagation in photonic crystals, and dynamics of ultra-cold atoms in optical arrays. Large intensity light can induce nonlinear response, ultracold atomic gases can be tuned into an interacting regime, which leads again to nonlinear wave equations on a mean field level. The interplay between disorder and nonlinearity, their localizing and delocalizing effects is currently an intriguing and challenging issue in the field. We will discuss recent advances in the dynamics of nonlinear lattice waves in random potentials. In the absence of nonlinear terms in the wave equations, Anderson localization is leading to a halt of wave packet spreading. Nonlinearity couples localized eigenstates and, potentially, enables spreading and destruction of Anderson localization due to nonintegrability, chaos and decoherence. The spreading process is characterized by universal subdiffusive laws due to nonlinear diffusion. We review extensive computational studies for one- and two-dimensional systems with tunable nonlinearity power. We also briefly discuss extensions to other cases where the linear wave equation features localization: Aubry-Andre localization with quasiperiodic potentials, Wannier-Stark localization with dc fields, and dynamical localization in momentum space with kicked rotors.
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