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This book describes the theory and selected applications of one of the most important mathematical tools used in the theoretical investigation of collective excitations in statistical physics, such as occur in superfluidity, superconductivity, plasma dynamics, superradiation, and in phase transitions. The author, who is a distinguished physicist and leading researcher in this area, begins with an introduction to functional integral techniques in equilibrium statistical thermodynamics, and discusses the expression of partition functions and Green functions in terms of functional integrals. Subsequent sections deal with the application of functional integrals in superfluid Bose systems, systems with Coulomb interaction, and superfluid Fermi systems. The final section considers the application of the concept of Bose-condensation of auxiliary fields to the theory of crystals, heavy atoms and also to the theory of model Hamiltonians (BCS and Dicke models).

Integration, Functional. --- Collective excitations.

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This is the first monograph that strives to give a complete and detailed description of the collective modes (CMs) in unconventional superfluids and superconductors (UCSF&SC). Using the most powerful method of modern theoretical physics - the path (functional) integral technique - authors build the three- and two-dimensional models for s-, p- and d-wave pairing in neutral as well as in charged Fermi-systems, models of superfluid Bose-systems and Fermi-Bose-mixtures. Within these models they study the collective properties of such systems as superfluid 3He, superfluid 4He,

Superfluidity. --- Superconductivity. --- Superconductors. --- Collective excitations.

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Collective excitations --- Integration, Functional --- Intégration des fonctions --- Functional integration --- Functional analysis --- Integrals, Generalized --- Excitations, Collective --- Energy-band theory of solids --- Exciton theory --- Collective excitations. --- Integration, Functional. --- Intégration des fonctions

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The Conference "Bologna 2000: Structure of the Nucleus at the Dawn of the Century" was devoted to a discipline which has seen a strong revival of research activities in the last decade. New experimental results and theoretical developments in nuclear physics will certainly make important contributions to our knowledge and understanding of Nature's fundamental building blocks. The interest aroused by the Conference among the scientific community was clearly reflected in the large number of participants. These represented the most important nuclear physics laboratories in the world. The Confe

Collective excitations -- Congresses. --- Electronic books. -- local. --- Nuclear excitation -- Congresses. --- Nuclear physics -- Congresses. --- Nuclear structure -- Congresses. --- Nuclear structure --- Nuclear physics --- Physics --- Physical Sciences & Mathematics --- Nuclear Physics --- Nuclear excitation --- Collective excitations

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Mechanical properties of solids --- Solid state physics. --- Collective excitations. --- Liquids. --- Physique de l'état solide --- Liquides --- Solid state physics --- Collective excitations --- Liquids --- Fluids --- Permeability --- Polywater --- Excitations, Collective --- Energy-band theory of solids --- Exciton theory --- Physics --- Solids --- Physique de l'état solide