Now showing items 1-3 of 3
Atomic radiative transitions in thermo field dynamics
(International Journal of Modern Physics A, 2003-03-20) [Artigo]
In this work we rederive the Lamb-Retherford energy shift for an atomic electron in the presence of a thermal radiation. Using the Dalibard, Dupont-Roc and Cohen-Tannoudji (DDC) formalism, where physical observables are ...
On the asymptotic behavior of effective QED at finite temperature
(European Physical Journal C, 2003-11-01) [Artigo]
The aim of this paper is to study finite temperature effects in effective quantum electrodynamics using Weisskopf's zero-point energy method in the context of thermo, field dynamics. After a general calculation for a weak ...
Operator ordering in quantum radiative processes
(Physica A: Statistical Mechanics and Its Applications, 2003-05-15) [Artigo]
In this work we reexamine quantum electrodynamics of atomic electrons in the Coulomb gauge in the dipole approximation and calculate the shift of atomic energy levels in the context of Dalibard, Dupont-Roc and Cohen-Tannoudji ...