Random-phase approximation approach to rotational symmetry restoration in a three-level Lipkin model

K. Hagino, G. F. Bertsch

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We study an extended Lipkin-Meshkov-Glick model that permits a transition to a deformed phase with a broken continuous symmetry. Unlike simpler models, one sees a persistent zero-frequency Goldstone mode past the transition point into the deformed phase. We found that the RPA formula for the correlation energy provides a useful correction to the Hartree-Fock energy when the number of particle N satisfies N > 3, and becomes accurate for large N. We conclude that the RPA correlation energy formula offers a promising way to improve the Hartree-Fock energy in a systematic theory of nuclear binding energies.

Original languageEnglish
Article number024307
Pages (from-to)243071-243075
Number of pages5
JournalPhysical Review C - Nuclear Physics
Volume61
Issue number2
Publication statusPublished - 2000 Feb
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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