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- W2296988724 abstract "We present two loop corrections to photon self energy at finite temperature in real time formalism. An expression for renormalized coupling constant has been derived in a form that is relevant for all temperature ranges of interest in QED, specifically for temperatures around T sim m, where m is electron mass. Temperature dependence is mainly contributed by hot fermions at T ge m. We use the calculations of vacuum polarization to determine the dynamically generated mass of photon, Debye screening length, plasma frequency up to the second order in alpha as well as the electromagnetic properties of a medium at m le T le 2m temperature. For higher temperatures, the existing renormalization scheme does not work well because of the increase in coupling constant. To exactly determine the validity of renormalization scheme, higher order calculations are required. The temperature T sim m is of specific interest from the point of view of the early universe. Such calculations have acquired more significance recently due to the possibility of producing electron-positron plasmas in laboratory." @default.
- W2296988724 created "2016-06-24" @default.
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- W2296988724 date "2011-10-16" @default.
- W2296988724 modified "2023-09-27" @default.
- W2296988724 title "Second order photon loops at finite temperature and charge renormalization" @default.
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- W2296988724 hasPublicationYear "2011" @default.
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