14 Result(s)
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Conference Paper
Joseph L. Birman
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Chapter and Conference Paper
Double stratonovich - Hubbard trick and novel path integral for a system of interacting fermions
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Chapter and Conference Paper
Dynamical su(8) for phase-coexistence: Thermodynamics of an so(4) × so(4) submodel
We review a scheme for describing a multi-phase interacting system of electrons within the dynamical algebra su(8): we discuss the thermodynamics of a submodel which incorporates the relevant physics, and has ...
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Chapter and Conference Paper
Phase coexistence in many-fermion systems
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Chapter and Conference Paper
Renormalization group theory of structural phase transitions in A-15: Pm3n-Oh 3
Results of a RG theory of phase transitions in A-15, or Pm3n structure are discussed and compared to the Landau theory results.
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Chapter and Conference Paper
Recent Developments in Non-Local Optics
In this paper a brief account is given of results of some recent investigations of four classes of effects due to non-locality (or spatial dispersion) upon optical phenomena in bounded solids. These are: Reson...
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Chapter and Conference Paper
Molien function and calculation of invariant polynomials for space groups
We have developed an algorithm for the computation of the Molien function (generating for the multiplicity of the identity representation in the symmetrized nth power of representation P of group G) and used it t...
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Chapter and Conference Paper
Group theory of the Landau — Thermodynamic theory of continuous phase transitions in crystals
A review is given of group-theory related aspects of the Landau-Thermodynamic Theory of continuous phase transitions in crystals. The review discusses developments of the theory during several time intervals. ...
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Chapter and Conference Paper
Comments
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Chapter and Conference Paper
Concluding Remarks
It is my pleasant duty to assist in closing our First Joint Seminar. Let me first express on behalf of the entire American group our thanks to the National Science Foundation-USA and the Academy of Sciences-US...
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Chapter and Conference Paper
Symmetry Effects in Resonance Scattering
A brief review is given of a recently obtained result that the elements of the phenomenological scattering tensor for inelastic scattering of light by elementary excitations in a crystal can be expressed as a ...
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Chapter and Conference Paper
Resonant Light Scattering by Phonons in Semiconductors
A few themes which are currently being investigated in resonant scattering are briefly reviewed: symmetry breaking; multiphonon scattering; optical dispersion-polariton effects; resonant scattering versus hot ...
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Chapter and Conference Paper
Theory of Resonant Light Scattering Processes in Solids
A survey is presented of some recent work on the theory of resonant Brillouin and Raman scattering in insulating solids. The major themes which are examined are the effect of intermediate state interactions, a...
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Chapter and Conference Paper
Theory of Interaction of Light with Insulating Crystals
The present work develops a formal theory of the interaction of radiation in insulators at zero temperature, from which one obtains expressions for the transition probabilities for elementary processes such as...
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Chapter and Conference Paper
Microscopic Theory of Lattice Raman Scattering in Crystals Containing Impurities
In this paper we develop a general theory of lattice Raman scattering by an insulator containing isolated mass defects which have no net charge with respect to the perfect lattice. The theory given here is spe...
