The properties of Green’s functions and various correlation functions of density and spin operators are considered in a homogeneous spin-1 Bose gas in different phases. The dielectric formalism is worked out and the partial coincidence of the one particle and collective spectra is pointed out below the temperature of Bose-Einstein condensation. As an application, the formalism is used to give two approximations for the propagators and the correlation functions and the spectra of excitations including shifts and widths due to the thermal cloud.
|Number of pages||1|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - Jan 1 2002|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics