Functional integrals for many-boson systems

A. Casher, D. Lurié, M. Revzen

Research output: Contribution to journalArticlepeer-review


We express the grand canonical partition function (GCPF) for a system of interacting bosons as a functional integral over one complex function. Our derivation is based on the so-called coherent-state representation [R. J. Glauber, Phys. Rev. 136, 2766 (1963)]. We show how to extract the perturbative expansion of the GCPF and the various Green's functions from our functional-integral representation and we indicate the relevance of our formalism to the theory of superfluidity.

Original languageEnglish
Pages (from-to)1312-1318
Number of pages7
JournalJournal of Mathematical Physics
Issue number8
StatePublished - 1968
Externally publishedYes


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