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cond-mat.stat-mech2003
Renormalization group and Ward identities in quantum liquid phases and in unconventional critical phenomena
C. Di Castro, R. Raimondi, S. Caprara
By reviewing the application of the renormalization group to different theoretical problems, we emphasize the role played by the general symmetry properties in identifying the rele…
cond-mat.stat-mech2003
Renormalization Group Approach to the Infrared Behavior of a Zero-Temperature Bose System
F. Pistolesi, C. Castellani, C. Di Castro +1
We exploit the renormalization-group approach to establish the {\em exact} infrared behavior of an interacting Bose system at zero temperature. The local-gauge symmetry in the brok…