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14. |
Fluid of penetrable spheres: Testing the universality of the bridge
functional Y. Rosenfeld, M. Schmidt, M. Watzlawek, and H. Löwen, Phys. Rev. E 62, 5006 (2000). Locate in [bare] [illustrated] list. Get [full paper] as pdf. Abstract. Penetrable spheres have been the object of recent extensive investigations as a prototype for intermicellar interactions in a solvent, and as representing a class of bounded potentials allowing complete interpenetrability of the particles. Here we compare density-functional and simulation results for the pair-correlation functions in a bulk fluid of penetrable spheres, as a stringent test for the approximation of "universality" of the bridge functional. Considering either a fundamental-measure functional for penetrable spheres or a perturbative treatment using a fundamental-measure hard-sphere functional, we conclude that hard-sphere-type bridge functionals are applicable also for bounded potentials with high penetrability. [figures] Read the [full paper] as pdf. |