Plane Wave Solutions to the Equations of Electrodynamics in an Anisotropic Medium

2019 ◽  
Vol 60 (4) ◽  
pp. 661-672 ◽  
Author(s):  
V. G. Romanov
Galaxies ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 32
Author(s):  
J. R. Nascimento ◽  
A. Yu. Petrov ◽  
A. R. Vieira

In this paper, we obtain dispersion relations corresponding to plane wave solutions in Lorentz-breaking extensions of gravity with dimension 3, 4, 5 and 6 operators. We demonstrate that these dispersion relations display a usual Lorentz-invariant mode when the corresponding additive term involves higher derivatives.


1994 ◽  
Vol 09 (20) ◽  
pp. 3497-3502 ◽  
Author(s):  
D.G. BARCI ◽  
C.G. BOLLINI ◽  
M.C. ROCCA

We consider a tachyon field whose Fourier components correspond to spatial momenta with modulus smaller than the mass parameter. The plane wave solutions have then a time evolution which is a real exponential. The field is quantized and the solution of the eigenvalue problem for the Hamiltonian leads to the evaluation of the vacuum expectation value of products of field operators. The propagator turns out to be half-advanced and half-retarded. This completes the proof4 that the total propagator is the Wheeler Green function.4,7


1990 ◽  
Vol 31 (12) ◽  
pp. 2917-2920 ◽  
Author(s):  
A. Das ◽  
T. Biech ◽  
D. Kay

2019 ◽  
Vol 29 (4) ◽  
Author(s):  
Alí Guzmán Adán ◽  
Heikki Orelma ◽  
Frank Sommen

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