Overview

Material particles, electrons, atoms, molecules, interact with one another by means of electromagnetic forces. That is, these forces are the cause of their being combined into condensed (liquid or solid) states. In these condensed states, the motion of the particles relative to one another proceeds in orderly fashion; their individual properties as well as the electric and magnetic dipole moments and the radiation and absorption spectra, ordinarily vary little by comparison with their properties in the free state. Exceptiotls are the special so-called collective states of condensed media that are formed under phase transitions of the second kind. The collective states of matter are characterized to a high degree by the micro-ordering that arises as a result of the interaction between the particles and which is broken down by chaotic thermal motion under heating. Examples of such pheonomena are the superfluidity of liquid helium, and the superconductivity and ferromagnetism of metals, which exist only at temperatures below the critical temperature. At low temperature states the particles do not exhibit their individual characteristics and conduct themselves as a single whole in many respects. They flow along capillaries in ordered fashion and create an undamped current in a conductor or a macroscopic magnetic moment. In this regard the material acquires special properties that are not usually inherent to it.

Full Product Details

Author:   V.N. Popov ,  V.S. Yarunin
Publisher:   Springer
Imprint:   Kluwer Academic Publishers
Edition:   1988 ed.
Volume:   9
Dimensions:   Width: 21.00cm , Height: 1.40cm , Length: 29.70cm
Weight:   1.100kg
ISBN:  

9789027727350

ISBN 10:   902772735
Pages:   215
Publication Date:   30 June 1988
Audience:   College/higher education ,  Professional and scholarly ,  Postgraduate, Research & Scholarly ,  Professional & Vocational
Format:   Hardback
Publisher's Status:   Active
Availability:   In Print  
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Table of Contents

1. Functional integrals In quantum theory.- §1. Gaussian functional integrals for systems of non-interacting particles.- §2. Methods of functional integration for interacting particles.- 2. Superfluid Bose systems.- §1. Perturbation theory for superfluid Bose systems.- §2. The effective action functional for superfluid systems.- §3. Quantum vortices in superfluid systems.- 3. Superfluid Fermi systems.- §1. Perturbation theory for superfluid Fermi systems.- §2. Collective excitations in superfluid Fermi systems.- 4. Interaction of radiation with matter. The linear theory.- § 1. Coherent and thermal radiation.- §2. The two-level system in an external field.- 5. Superradiant phase transitions.- §1. The static field in the single-centre model of the interaction of matterwith single-mode radiation.- §2. The static field in the multi-centre model of the interaction of matter withsingle-mode radiation.- §3. Other models and a discussion of the results.- 6. Superradiant coherent impulses.- § 1. Non-linear interaction of light with matter.- §2. The dynamics of the single-centre model of the interaction of lightwith matter.- §3. The dynamics of the single-mode multi-centre model of the interaction oflight with matter.- Concluding Remarks.

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