Infinite compressibility states in the Hierarchical Reference Theory of fluids. I. Analytical considerations

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dc.creatorReiner, Albert
dc.date2003-08-23
dc.date2005-03-05
dc.date.accessioned2026-07-25T15:18:35Z
dc.descriptionIn its customary formulation for one-component fluids, the Hierarchical Reference Theory yields a quasilinear partial differential equation for an auxiliary quantity f that can be solved even arbitrarily close to the critical point, reproduces non-trivial scaling laws at the critical singularity, and directly locates the binodal without the need for a Maxwell construction. In the present contribution we present a systematic exploration of the possible types of behavior of the PDE for thermodynamic states of diverging isothermal compressibility kappa[T] as the renormalization group theoretical momentum cutoff approaches zero. By purely analytical means we identify three classes of asymptotic solutions compatible with infinite kappa[T], characterized by uniform or slowly varying bounds on the curvature of f, by monotonicity of the build-up of diverging kappa[T], and by stiffness of the PDE in part of its domain, respectively. These scenarios are analzyed and discussed with respect to their numerical properties. A seeming contradiction between two of these alternatives and an asymptotic solution derived earlier [Parola et al., Phys. Rev. E 48, 3321 (1993)] is easily resolved.
dc.descriptionJ. Stat. Phys., in press. Minor changes to match the published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0308467
dc.identifierhttp://arxiv.org/abs/cond-mat/0308467
dc.identifierJ. Stat. Phys. 118 (2005) 1107-1127
dc.identifierdoi:10.1007/s10955-004-2017-x
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/32789
dc.subjectStatistical Mechanics
dc.titleInfinite compressibility states in the Hierarchical Reference Theory of fluids. I. Analytical considerations
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