bhupendra nath tiwari (109 résultats)

Etat : Sehr gut. Zustand: Sehr gut | Sprache: Englisch | Produktart: Bücher.

Etat : Sehr gut. Zustand: Sehr gut | Sprache: Englisch | Produktart: Bücher.

Etat : Sehr gut. Zustand: Sehr gut | Sprache: Englisch | Produktart: Bücher.

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Etat : New. In English.

Taschenbuch. Etat : Neu. Neuware -From the perspective of statistical mechanics, the present research offers intrinsic Riemannian geometric investigation towards the fluctuation theory of complex systems. The entropic formulation is considered as the principle ingredient which enables to obtain connection between the statistical mechanics and the corresponding thermodynamics. Away from the standard Shannon system, we provide modeling for the complex entropies, viz., the Renyi, Tsallis, Abe and structural systems. For thermally excited one, two and three particle configurations, we find that the local statistical pair correlation functions, determined by the components of covariant metric tensor of the thermodynamic geometry of associated entropies possess well defined, definite expressions. In all the above mentioned cases, we notice a non-degenerate intrinsic Riemannian manifold. In contrast to the Gibbs-Shannon entropy, the highlighting of the present study is that a finite particle descriptions of the complex statistical configurations correspond to an interacting system.Books on Demand GmbH, Überseering 33, 22297 Hamburg 108 pp. Englisch.

Taschenbuch. Etat : Neu. Neuware -From the perspective of moduli stabilization and physics of D-branes, we consider the role of the real intrinsic Riemannian geometry and describe the statistical nature of vacuum fluctuations. The issue of the wall (in)stabilities is analysed for the marginal and threshold like vacua for arbitrary component moduli configurations breaking down to finitely many U(1)'s. From the notion of the statistical fluctuation theory, we find for both the mariginal and threshold configurations that the Gaussian fluctuations over a given equilibrium vacuum yield a well-defined, non-degenerate, curved and regular intrinsic Riemannian manifold as a function of the vacuum expectation values of the moduli. For a finite component system, we have shown that the global ensemble stability and phase transition of the underlying vaccum configuration algebraically reduce to a finite polynomial as the moduli coupling(s). The perspective study includes local and global stability domains of Higgs moduli, Coulomb branch, Calabi-Yau moduli, heterotic moduli, instanton moduli and the moduli pertaining to topological strings and an ensemble of D and M-particles.Books on Demand GmbH, Überseering 33, 22297 Hamburg 116 pp. Englisch.

Taschenbuch. Etat : Neu. Neuware -Given a Sen entropy function, the present research explores geometric and algebraic properties of a class of four and higher dimensional extremal black holes under arbitrary higher derivative stringy corrections. The notion of embedding theory offers generalized complex structures and mapping properties of associated differentiable manifolds. The convexity is realized in extended subfield of finitely many eigenvalues of the Hessian of Sen entropy function. The commutative algebra framework offers corresponding spectra and generalized spectra as Krull and convex hull of the given eigenvalues. For the minimally extended subfield, the attractor fixed point configurations possess thermodynamic type spectra. In the limit of AdS near horizon geometry, the attractor flow analysis characterizes the stability of extremal black holes. The string compactification perspective shows a set of deformed S-duality transformations involving duality invariant charges and monodromy invariant parameters. The role of algebraic geometry is discussed towards the viewpoints of rational conformal field theory, elliptic curves, deformed quantization(s), moduli manifolds and Calabi-Yau.Books on Demand GmbH, Überseering 33, 22297 Hamburg 76 pp. Englisch.

Taschenbuch. Etat : Neu. Neuware -The present research explores the role of generalized uncertainty inequalities in the theory of quantum gravity. Motivated from the noncommutative nature of string theory, we show that there exists an ultraviolet/ infrared mixing dependent function. From the perspective of higher derivative stringy corrections, the uncertainty principle arises as the analyticity condition of a complex function. For a given ultraviolet cutoff, this observation non-trivially modifies the algebra of quantum observables. With the postulate that Planck length is the minimal length scale in nature, our analysis is in accordance with T-duality symmetry and the existence of both the maximum and minimum length scales. Given a finite size universe, we find that the uncertainty inequalities do exist in any quantum theory. Both the Regge behavior of string spectrum and the black hole horizon area quantization are natural consequences. The role of the generalized uncertainty principle is discussed towards the effects of quantum gravity, short distance geometries, Fourier transformation, distribution theory, discretization of spacetime and thus the perspective for the geometric origin of M-theory.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.

Taschenbuch. Etat : Neu. Neuware -The present research offers thesis of experiences, truth and false values, and thus the socio-scientific understanding of knowledge theories. From the philosophical journey of Heraclitus, Parmenidian, Plato, Aristotle, Descartes, Spinoza, Leibnitz, Hume and Kant, we construct the theory of goodwill, global wisdom and local experiences in the natural philosophy. Given a set of smooth experience functions, we have demonstrated that the Descarte's knowledge follows from the corresponding Hume's definition of the knowledge, as the late time effect. Following the notion that the reality consists of events which are not connected by certain law(s) but they possess an association, contiguity and continuity, we examine the quantum viewpoints, viz. the philosophical quest of Hume and Kant. From the perspective of rational philosophy, the statistical and partially ordered knowledge theories characterize the classical and quantum endeavors towards the existential category, social vacuumness and fundamental theories. The thesis of experiences and goodwill theory are discussed towards the metaphysical theories of natural philosophy.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.

Taschenbuch. Etat : Neu. Neuware -From the perspective of D-brane physics, we consider the role of the real intrinsic Riemannian geometry and describe the statistical nature of gauge and exotic instanton vacuum fluctuations. For the Veneziano-Yankielowiz/ Affleck-Dine-Seiberg and non-perturbative instanton superpotentials, the issue of the wall (in)stabilities is analysed for marginal and threshold like vacua, and their arbitrary linear combinations. Physically, for both the stationary and non-stationary statistical configurations with and without the statistical fluctuations of the gauge and exotic instanton curves, the Gaussian fluctuations over equilibrium (non)-stationary vacua accomplish a well-defined, non-degenerate, curved and regular intrinsic Riemannian manifolds for statistically admissible domains of (i) one loop renormalized mass and vacuum expectation value of the chiral field for the stationary vacua and (ii) the corresponding contributions of the instanton curves for the non-stationary vacua. As a function of the vacuum expectation value of the chiral field, the global ensemble stability and phase transition criteria algebraically reduce to the invariance of the quadratic and quartic polynomials.Books on Demand GmbH, Überseering 33, 22297 Hamburg 108 pp. Englisch.

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Paperback. Etat : New.

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Etat : New. SUPER FAST SHIPPING.

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Etat : New. pp. 68.

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Etat : New. In.

Taschenbuch. Etat : Neu. Neuware -La géométrie thermodynamique de l'espace d'états offre la caractérisation de l'instabilité d'une serie des trous noirs et des branes noirs de la théorie des cordes. Dans cet étude, notre perspective est divisée en deux parties dont la première est les corrections dans l¿entropie des trous noirs en raison du principe d¿incertitude généralisée et la seconde est les corrections des dérivées supérieures à l¿entropie des trous noirs par la méthode de la fonction de l¿entropie de Sen. Nous avons analysé la géométrie de Weinhold des trous noirs dilatoniques dans la domaine de Poincaré de AdS4, la géométrie de Ruppenier des trous noirs de Reissner-Nordström et des trous noirs magnétiques corrigée par le principe d¿incertitude généralisée, des trous noirs supersymétriques extrémaux en D = 4, des trous noirs non-supersymétriques extrémaux en D = 4, des branes noirs non-extrémaux D1-D5 et des branes noirs non-extrémaux D2-D6-NS5 en D = 10 et des trous noirs en rotation, comme les trous noirs extrémaux de Kerr-Newman, de Kaluza-Klein, et de la théorie des cordes hétérotiques.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 168 pp. Französisch.

Paperback. Etat : New.

Taschenbuch. Etat : Neu. Neuware -From the perspective of black hole physics, the present research examines the thermodynamic geometries of extremal and non-extremal black hole configurations in string theory and M-theory with 2, 3, 4, 5 and 6 charges. We analyzed the structure of state-space geometry, such as regularity, existence of critical points, lines, surfaces, hypersurfaces and associated phase transitions for BPS black holes, rotating black holes, black strings, black rings, multi-centered black branes, brane fractionation, Mathur's fuzzballs, subensemble theory in string theory and bubbling black brane foam solutions in M-theory. Generically, we find that charged, anticharged and rotating black holes correspond to a weakly interacting equilibrium statistical basis over Gaussian fluctuations. The state-space and chemical fluctuations pertaining to the two parameter giants and superstars can be characterized as an ensemble of arbitrary liquid droplets or irregular shaped fuzzballs. The higher derivative corrections are examined due to generalized uncertainty principle and string theory. Finally, we consider the unified role of the real Riemannian geometry, ensemble theory, vacuum fluctuations and D-branes.Books on Demand GmbH, Überseering 33, 22297 Hamburg 376 pp. Englisch.

Taschenbuch. Etat : Neu. Neuware -The present research offers thermodynamic geometric properties of black holes in string theory and M-theory. It systematically investigates the state-space and conformally related chemical geometries for extremal and non-extremal black holes, black strings, black rings and supertubes in four and higher spacetime dimensions. From the perspective of the intrinsic differential geometry, the questions of stability, regularity, existence of critical phenomena and phase transitions have been analyzed for charged anticharged black holes in a given basin of attractor. For the two parameter half BPS giants and superstars, an ensemble of arbitrary liquid droplets or irregular shaped fuzzballs shows that the chemical correlations involve ordinary summations, while the state-space correlations are depicted by standard polygamma functions. The state-space geometry provides definite stability character to black brane configurations under both the Planck length corrections and higher derivative stringy corrections. Perspective research includes D-branes, attractor mechanism, topological trees, Calabi-Yau compactifications, moduli space geometry and algebraic geometry.Books on Demand GmbH, Überseering 33, 22297 Hamburg 240 pp. Englisch.