What should we understand by the four-momentum of physical system?
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DOI: 10.1088/1402-4896/ad3b45
Abstract: It is shown that, in general, in curved spacetime, none of the known definitions of four-momentum correspond to the definition, in which all the system’s particles and fields, including fields outside matter, make an explicit… read more here.
Keywords: field; system; four momentum; vector fields ... See more keywords
Classical and quantal aspects of Minkowski's four-momentum in analog gravity
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DOI: 10.1103/physreva.102.052201
Abstract: The electrodynamic theory of continuous media is probably the most convenient platform when trying to construct analog gravity theories. Quite naturally, this topic has gained considerable interest. One peculiar but not so well known feature… read more here.
Keywords: analog gravity; momentum; minkowski four; four momentum ... See more keywords