摘要:
AbstractWe study the generalization of the usual effective action Γ[ϕ] of Bose systems to an explicit functional Γ[ϕ,G, α2, α4] of field ϕ, Green's functionG, and three‐ and four‐point vertex functions α3, α4. The equations of motion following by extremization with respect to ϕ,G, α3, α4provide for non‐linear integral equations whose solution can account for a wide variety of non‐perturbative effects: Condensation of particles, pairs, and three and four‐particle clusters. There can be spontaneous generation of mass as w
ISSN:0015-8208
DOI:10.1002/prop.19820300402
出版商:WILEY‐VCH Verlag
年代:1982
数据来源: WILEY