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cc-by, (c) Bernal et al., 2012
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/22524

Analytic behavior of the QED polarizability function at finite temperature

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We revisit the analytical properties of the static quasi-photon polarizability function for an electron gas at finite temperature, in connection with the existence of Friedel oscillations in the potential created by an impurity. In contrast with the zero temperature case, where the polarizability is an analytical function, except for the two branch cuts which are responsible for Friedel oscillations, at finite temperature the corresponding function is non analytical, in spite of becoming continuous everywhere on the complex plane. This effect produces, as a result, the survival of the oscillatory behavior of the potential. We calculate the potential at large distances, and relate the calculation to the non-analytical properties of the polarizability.

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BERNAL SERRANO, Antonio, PÉREZ, Armando. Analytic behavior of the QED polarizability function at finite temperature. _AIP Advances_. 2012. Vol. 2, núm. 1, pàgs. p 012152-1-012152-9. [consulta: 30 de gener de 2026]. ISSN: 2158-3226. [Disponible a: https://hdl.handle.net/2445/22524]

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