Structure of the perturbation series of the spin-1 Bose gas at low temperatures

Péter Szépfalusy, Gergely Szirmai

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The properties of Green's functions and various correlation functions of density and spin operators in a homogeneous spin-1 Bose gas in different phases, were discussed. It was observed that by treating the regular polarization contributions as perturbations, damping was obtained for a number of modes determined first in the Bogoliubov approximation. The analysis showed that the formalism was 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.

Original languageEnglish
Article number043602
Pages (from-to)436021-436025
Number of pages5
JournalPhysical Review A. Atomic, Molecular, and Optical Physics
Volume65
Issue number4 B
Publication statusPublished - Apr 2002

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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