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Returning to the Post constraints
Author(s) -
Dmitriev V.
Publication year - 2000
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/1098-2760(20001105)27:3<201::aid-mop16>3.0.co;2-m
Subject(s) - reciprocal , rank (graph theory) , simple (philosophy) , lossy compression , algebraic number , tensor (intrinsic definition) , point (geometry) , theoretical physics , algebra over a field , mathematics , computer science , calculus (dental) , pure mathematics , physics , mathematical analysis , epistemology , geometry , artificial intelligence , combinatorics , medicine , philosophy , linguistics , dentistry
A new point of view on the so‐called Post constraints discussed widely in the scientific literature is presented. These constraints, being algebraic relations between some of the elements of the fourth‐rank constitutive tensor, reduce the number of independent parameters of the tensor. These relations, which are in principle, correct, are far from being universal, and are applicable only in a particular case with very strong restrictions on the properties of media. These restrictions correspond to the reciprocal media with local and instantaneous interaction between fields. Such media are nonphysical, except for the classical vacuum. Formally, the Post constraints correspond to a consequence of much more universal conditions which must be fulfilled for any linear homogeneous bianisotropic lossy (both reciprocal and nonreciprocal) media with dispersion. We briefly define and discuss these conditions using simple argumentations. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 201–203, 2000.