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## Main Question or Discussion Point

Hi guys,

I'm looking for some references where dispersion relations, say for photons, are explicitely written out in a generic medium. In other words, the dispersion relation for particles not propagating in the vacuum is a different one than the standard vacuum one [tex]E^2 = p^2 + m^2[/tex] and I'm looking for papers/books where such relations are written out. Possibly for the photon or for electrons. Do you know any?

I'm looking for some references where dispersion relations, say for photons, are explicitely written out in a generic medium. In other words, the dispersion relation for particles not propagating in the vacuum is a different one than the standard vacuum one [tex]E^2 = p^2 + m^2[/tex] and I'm looking for papers/books where such relations are written out. Possibly for the photon or for electrons. Do you know any?