1995/12/23 by Hans-Peter Pavel, H. -P. Pavel, D. Blaschke +6
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Quantum Chromodynamics and Particle Interactions #hep-th
paper · pdf · doi:10.48550/arxiv.hep-th/9512193
13 pages, Latex
arxiv created 1995/12/23 · openalex publication_date 1995/12/23 · arxiv updated 2009/11/30 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
Generalizing the Bogoliubov model of a weakly non-ideal Bose gas to massless λφ4 theory we show that spontaneous breaking of symmetry occurs due to condensation in a coherent vacuum % which is energetically favoured compared to the perturbative one. and leads to a vacuum energy density which is lower than that obtained by Coleman and Weinberg using the one-loop effective potential method. We discuss the alternative of a squeezed condensate and find that for the massless λφ4 theory spontaneous symmetry breaking to a squeezed vacuum does not occur.