A microscopic study of the ground-state properties and excitation spectrum of an interacting Bose system using the combined method relating correlated-basis-functions and the canonical transformations

K. W. Wong, Wan Ki Chow, P. C W Fung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Previously, Wong and Fung proposed a microscopic theory which combines the methods of the Correlated-Basis-Functions and the canonical transformation approach in studying a many-boson system. Using a model potential function which satisfies certain criteria, a one-to-one mapping between real- and quasi-particle spaces exists. We have expressed the explicit forms of the relevant transformation matrix elements in terms of the two-particle correlation function. Using our special model for the two-particle potential function, we calculate the ground-state properties and the low-lying excitation spectrum of a Bose system with liquid helium density and report that numerical results agree reasonably well with experimental data.
Original languageEnglish
Pages (from-to)456-489
Number of pages34
JournalPhysica A: Statistical Mechanics and its Applications
Volume138
Issue number3
DOIs
Publication statusPublished - 1 Jan 1986

ASJC Scopus subject areas

  • Mathematical Physics
  • Statistical and Nonlinear Physics

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