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2008-06-06
Maxwell's Equations, Symplectic Matrix, and Grid
By
Progress In Electromagnetics Research B, Vol. 8, 115-127, 2008
Abstract
The connections between Maxwell's equations and symplectic matrix are studied. First, we analyze the continuous-time Maxwell's differential equations in free space and verify its time evolution matrix (TEMA) is symplectic-unitary matrix for complex space or symplectic-orthogonal matrix for real space. Second, the spatial differential operators are discretized by pseudo-spectral (PS) approach with collocated grid and by finite-difference (FD) method with staggered grid. For the PS approach, the TEMA conserves the symplectic-unitary property. For the FD method, the TEMA conserves the symplectic-orthogonal property. Finally, symplectic integration scheme is used in the time direction. In particular, we find the symplectiness of the TEMA also can be conserved. The mathematical proofs presented are helpful for further numerical study of symplectic schemes.
Citation
Wei Sha, Xian-Liang Wu, Zhi-Xiang Huang, and Ming-Sheng Chen, "Maxwell's Equations, Symplectic Matrix, and Grid," Progress In Electromagnetics Research B, Vol. 8, 115-127, 2008.
doi:10.2528/PIERB08052303
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