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cond-mat.stat-mech2000
Finite Temperature Collapse of a Bose Gas with Attractive Interactions (extended version)
Erich J. Mueller, Gordon Baym
We study the mechanical stability of the weakly interacting Bose gas with attractive interactions, and construct a unified picture of the collapse valid from the low temperature co…
hep-ph2000
Self-consistent approximations: application to a quasiparticle description of the thermodynamic properties of relativistic plasmas
Benoit Vanderheyden, Gordon Baym
We generalize the concept of conserving,Φ-derivable, approximations to relativistic field theories. Treating the interaction field as a dynamical degree of freedom, we derive the t…