Licht Und Materie
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Light And Matter Ia Licht Und Materie Ia
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Author : L. Genzel
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Light And Matter Ia Licht Und Materie Ia written by L. Genzel and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
159 elements only between states which differ in one of the single-electron wave functions, in short, HeR induces only one-electron transitions. The matrix elements 1mn and Pmn reduce to matrix elements between the single-electron wave functions. We are interested primarily in crystalline solids for which the band model is a good approximation. The Bloch single-electron wave function in this model has the form: N'I ili-';; U. r.;;) ( (1.14) ""nk r, =e nh\r , where n is the band index and U (r) has the periodicity of the lattice. The form of the Bloch function follows from the translational symmetry of the crystal, and the matrix elements between Bloch states are subject to the condition of wave-vector conservation: k'=k, for
Light And Matter Ic Licht Und Materie Ic
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Author : Hermann Haken
language : en
Publisher:
Release Date : 2014-01-15
Light And Matter Ic Licht Und Materie Ic written by Hermann Haken and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-01-15 with categories.
Light And Matter Ii Licht Und Materie Ii
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Author : S. Flügge
language : de
Publisher: Springer
Release Date : 1959-01-16
Light And Matter Ii Licht Und Materie Ii written by S. Flügge and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959-01-16 with Science categories.
Licht Und Materie Ib
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Author :
language : en
Publisher:
Release Date : 1961
Licht Und Materie Ib written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with categories.
Licht Und Materie Ib Light And Matter Ib
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Author : J.L. Birman
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Licht Und Materie Ib Light And Matter Ib written by J.L. Birman and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
Light And Matter Id Licht Und Materie Id
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Author : H. Bilz
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Light And Matter Id Licht Und Materie Id written by H. Bilz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The dynamical properties of solids have recently attracted renewed interest in connection with the increasing understanding of phase transitions and re lated phenomena. In particular, soft modes or, more generally, phonon 'anom alies' seem to play an important role in structural and electronic phase tran sitions, such as ferroelectric or superconducting transitions. The understanding of the mechanisms responsible for the occurrence of unusually low frequencies in phonon spectra requires a detailed analysis of the microscopic forces governing the lattice vibrations. Of particular importance is the influence of the electron lattice interaction in the adiabatic approximation which in many cases is the origin of peculiarities in the phonon self-energy. In this work the vibrational spectra of pure non-metals and of those con taining point defects are investigated. ' In these materials the interrelation be tween the pseudo-harmonic forces (determining the phonon dispersion re lations) and the non-linear anharmonic and electron-phonon forces (as they act in infrared and Raman spectra) is most obvious and can be quantitatively analysed in terms of appropriate models. The main task is to arrive at a physically correct treatment of electronic degrees of freedom, as for example in an electronic 'shell' model, which leads to the description of phonon spectra in terms of long-range polarizabilities and short-range deformabilities. The pur pose of our review is to stimulate further investigations which, we hope, will result in explicit relations between the parameters of the semi-microscopic models and the matrix elements from the electronic band structure.
Light And Matter Ic Licht Und Materie Ic
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Author : Hermann Haken
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Light And Matter Ic Licht Und Materie Ic written by Hermann Haken and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
The concept of the laser came into existence more than a decade ago when ScHAWLOW and TowNES showed that the maser principle could be extended to the optical region. Since then this field has developed at an incredible pace which hardly anybody could have foreseen. The laser turned out to be a meeting place for such different disciplines as optics (e.g. spectroscopy), optical pumping, radio engineering, solid state physics, gas discharge physics and many other fields. The underlying structure of the laser theory is rather simple. The main questions are: what are the light intensities (a), what are the frequencies (b), what fluctua tions occur (c), or, in other words, what are the coherence properties. Roughly speaking these questions are treated by means of the rate equations (a), the semiclassical equations (b), and the fully quantum mechanical equations (c), respectively. The corresponding chapters are written in such a way that they can be read independently from each other. For more details about how to proceed, the reader is advised to consult Chap. I.4.
Licht Und Materie Ib Light And Matter Ib
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Author : Joseph Birman
language : en
Publisher: Springer
Release Date : 2014-03-12
Licht Und Materie Ib Light And Matter Ib written by Joseph Birman and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-03-12 with Science categories.
Geophysik Iii Geophysics Iii
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Author : Karl Rawer
language : de
Publisher: Springer
Release Date : 1972-12-06
Geophysik Iii Geophysics Iii written by Karl Rawer and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972-12-06 with Science categories.
Laser Theory
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Author : Hermann Haken
language : en
Publisher: Springer
Release Date : 1984-03-01
Laser Theory written by Hermann Haken and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984-03-01 with Science categories.
This book, written by one of the pioneers of laser theory, is now considered a classic by many laser physicists. Originally published in the prestigious Encyclopedia of Physics series, it is now being republished in paperback to make it available not only to professors and scientists, but also to students. It presents a thorough treatment of the theory of laser resonators, the quantum theory of coherence, and the quantization of electromagnetic fields. Especial emphasis is placed on the quantum-mechanical treatment of laser light by means of quantum-mechanical Langevin equations, the density matrix equation, and the Fokker-Planck equation. The semiclassical approach and the rate equa tion approach are also presented. The principles underlying these approaches are used to derive the relevant equations, from which, in turn, the various properties of laser light are derived. Preface. The concept of the laser came into existence more than a decade ago when SCHAWLOW and TOWNES showed that the maser principle could be extended to the optical region. Since then this field has developed at an incredible pace which hardly anybody could have foreseen. The laser turned out to be a meeting place for such different disciplines as optics (e. g. spectroscopy). optical pumping, radio engineering, solid state physics, gas discharge physics and many other fields. The underlying structure of the laser theory is rather simple.