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Title: 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
Authors: Wong, KW
Chow, WK 
Fung, PCW
Issue Date: 1986
Source: Physica A. Statistical mechanics and its applications, 1986, v. 138, no. 3, p. 456-489
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.
Publisher: Elsevier
Journal: Physica A. Statistical mechanics and its applications 
ISSN: 0378-4371
EISSN: 1873-2119
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