Quantizing the EM-field

  • Thread starter Niles
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Hi

In all the books I've read on quantization of the EM-field, they do it 2 times: First they do it for a 1D cavity with no sources, which yields single-mode fields. Then they do it for free space with no sources, which yields multi-mode fields. I can't see the connection between these two setups. Somehow the physics of free space can be expressed by 1D cavities?

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Niles.
 

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A. Neumaier
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Hi

In all the books I've read on quantization of the EM-field, they do it 2 times: First they do it for a 1D cavity with no sources, which yields single-mode fields. Then they do it for free space with no sources, which yields multi-mode fields. I can't see the connection between these two setups. Somehow the physics of free space can be expressed by 1D cavities?
No. The cavity case is just a warm-up exercise for the more complex full thing, to demonstrate how the machinery works.
 

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