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

P. 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
Pages (from-to)436021-436025
Number of pages5
JournalPhysical Review A
Volume65
Issue number4 B
Publication statusPublished - Apr 2002

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perturbation
approximation
gases
Green's functions
damping
formalism
operators
propagation
shift
polarization
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Atomic and Molecular Physics, and Optics

Cite this

Structure of the perturbation series of the spin-1 Bose gas at low temperatures. / Szépfalusy, P.; Szirmai, Gergely.

In: Physical Review A, Vol. 65, No. 4 B, 04.2002, p. 436021-436025.

Research output: Contribution to journalArticle

Szépfalusy, P. ; Szirmai, Gergely. / Structure of the perturbation series of the spin-1 Bose gas at low temperatures. In: Physical Review A. 2002 ; Vol. 65, No. 4 B. pp. 436021-436025.
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