Tensor spherical harmonics and tensor multipoles. I. Euclidean space

1976 ◽  
Vol 17 (10) ◽  
pp. 1903-1909 ◽  
Author(s):  
M. Daumens ◽  
P. Minnaert
Author(s):  
D.E. Winch ◽  
P.H. Roberts

AbstractDifferentiation of the well-known addition theorem for Legendre polynomials produces results for sums over order m of products of various derivatives of associated Legendre functions. The same method is applied to the corresponding addition theorems for vector and tensor spherical harmonics. Results are also given for Chebyshev polynomials of the second kind, corresponding to ‘spin-weighted’ associated Legendre functions, as used in studies of distributions of rotations.


1984 ◽  
Vol 25 (10) ◽  
pp. 2888-2894 ◽  
Author(s):  
Mark A. Rubin ◽  
Carlos R. Ordóñez

2013 ◽  
pp. 612-615
Author(s):  
Thomas W. Baumgarte ◽  
Stuart L. Shapiro

1951 ◽  
Vol 29 (5) ◽  
pp. 393-402 ◽  
Author(s):  
P. R. Wallace

We develop a systematic analysis of the radiation from a given oscillating system of charges and currents, without any approximations. Using a simple vector identity, the vector potential is separated into irrotational and solenoidal parts. The field may be expressed in terms of the latter alone. A similar vector identity involving the operator L = r × grad (the rotation operator) permits the separation of the field into parts in which the radial components of the electric and magnetic field, respectively, vanish. The energy flux, energy density, and angular momentum density may in each case be expressed in terms of the angular operators L, L2. Expansion in the eigenfunctions of these operators, the spherical harmonics, corresponds to the separation into electric and magnetic multipoles of all orders. Introduction of "tensor spherical harmonics" enables us to exhibit these radiations in terms of natural multipoles (derivatives of 1/r). All calculations are carried out without restriction as to size of radiating system relative to wave length, in the induction as well as the radiation region.


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