- Tytuł:
- Two-Level Atom at Finite Temperature
- Autorzy:
- Sowiński, T.
- Powiązania:
- https://bibliotekanauki.pl/articles/1584982.pdf
- Data publikacji:
- 2009-12
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
11.10.Wx
32.10.Dk
31.15.ap
32.70.Jz - Opis:
- Properties of a two-level atom coupled to the quantized electromagnetic field at finite temperature are determined. The analysis is based on a new method (inspired by quantum electrodynamics) of describing qubits, developed previously at zero temperature. In this paper, we make a generalization to finite temperature by introducing the Matsubara formalism and the temperature propagators. We analyze the spectral properties of different types of propagators and we derive a direct connection between the temperature propagators and the real time propagators. To show the effectiveness of this method, we calculate the temperature dependence of the polarizability of a two-level atom in the lowest order of perturbation theory and we predict an unexpected sharpening of the resonance. The whole discussion is carried out without the rotating wave approximation.
- Źródło:
-
Acta Physica Polonica A; 2009, 116, 6; 994-1005
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł