TY  - JOUR
AU  - Bernal, A.
AU  - Perez, A.
PY  - 2012
DA  - 2012//
TI  - Analytic behavior of the QED polarizability function at finite temperature
T2  - AIP Adv.
JO  - AIP Advances
SP  - 012152
EP  - 9pp
VL  - 2
IS  - 1
PB  - Amer Inst Physics
AB  - 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.
SN  - 2158-3226
UR  - http://arxiv.org/abs/1101.3862
UR  - https://doi.org/10.1063/1.3690964
DO  - 10.1063/1.3690964
LA  - English
N1  - WOS:000302225400070
ID  - Bernal+Perez2012
ER  -