The Abraham–Minkowski controversy is a physics debate concerning electromagnetic momentum within dielectric media.[1][2] Two equations were first suggested by Hermann Minkowski (1908)[3] and Max Abraham (1909)[4][5] for this momentum. They predict different values, from which the name of the controversy derives.[6] Experimental support has been claimed for both.[7][8][9][10]
The two points of view have different physical interpretations and thus neither need be more correct than the other.[11] David J. Griffiths argues that, in the presence of matter, only the total stress–energy tensor carries unambiguous physical significance; how one apportions it between an "electromagnetic" part and a "matter" part depends on context and convenience.[12]
Several papers have claimed to have resolved this controversy.[13][14][15][16][17][18]
The controversy is still of importance in physics beyond the Standard Model where electrodynamics gets modifications, like in the presence of axions.[19]
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