Eigenvectors of the EM stress-energy tensor

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SUMMARY

The discussion centers on the physical interpretation of the eigenvectors of the electromagnetic (EM) stress-energy tensor. Robert posits that an eigenvector represents a directed area where the energy-momentum flow aligns with the area vector. However, he questions whether this concept applies solely to the 3x3 stress tensor rather than the full energy-momentum-stress tensor. The conversation highlights the need for clarity in distinguishing between these tensors in the context of eigenvector analysis.

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What do they mean?
My question is that what is the physical meaning of the EM stress-energy tensor's eigenvectors?
Thanks for the answers - Robert
 
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I would think an eigenvector of a stress energy tensor to be that directed area for which the energy-momentum passing through is collinear with the area vector but I'm just guessing.
 
Isn't this rather provided by the eigenvectors of the ##3 \times 3## stress tensor alone and not the energy-momentum-stress tensor?
 

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