Soluble Model Fluids with Complete Scaling and Yang-Yang Features
Claudio A Cerdeiriña1, Gerassimos Orkoulas2, Michael E Fisher3
1Departamento de Física Aplicada, Universidad de Vigo-Campus del Agua, Ourense 32004, Spain.
Abstract:
Yang-Yang (YY) and singular diameter critical anomalies arise in exactly soluble compressible cell gas (CCG) models that obey complete scaling with pressure mixing. Thus, on the critical isochore ρ=ρ(c), C(μ)≔-Td(2)μ/dT(2) diverges as |t|^(-α) when t∝T-T(c)→0^(-) while ρ(d)-ρ(c)∼|t|^(2β) where ρ(d)(T)=1/2[ρ(liq)+ρ(gas)]. When the discrete local CCG cell volumes fluctuate freely, the YY ratio R(μ)=C(μ)/C(V) may take any value -∞
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