THEORY OF THE MANY-BODY BOSE SYSTEM
Abstract
The purpose of the work was to study the collective elementary excitations, as well as the ground state properties, of the non-relativistic many-body system of bosons interacting with short range forces. The ultimate aim is the theory of superfluid helium, and the work therefore was concerned with avoiding the limitations to low density and/or weak forces which characterize the Bogoliubov theory of the non-ideal Bose gas and those treatments which derive from it. In contrast to the fermion case, where the statistics tend to suppress the many-particle correlation effects of short range forces, there is in the boson case no reason to suppose that a free particle or pair approximation provides an adequate starting point for a perturbation procedure, except in the low density limit. The basic approach, therefore, was to explore the use of field theoretic representations which include from the start at least some collective many-body effects of the strong short-range interaction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1964
- Accession Number
- AD0602911
Entities
People
- P. R. Zilsel
Organizations
- Case Western Reserve University