We report the first observation, by computer simulation, of a purely entropic demixing transition in a three-dimensional binary hard-core mixture. This transition is observed in a mixture of large and small cubes. We also find evidence for demixing in other hard-core fluids and, in the case of an athermal polymer solution, we observe a purely entropy-driven polymer collapse. For the study of both the hard-core demixing and polymer collapse, it was essential to use novel collective Monte Carlo moves.
机构:
Banha Univ, Fac Sci, Dept Phys, Banha, Egypt
King Khalid Univ, Coll Arts & Sci, Dept Phys, Bisha, Saudi ArabiaSultan Qaboos Univ, Dept Phys, Al Khoud, Oman
Khedr, M. Bahaa
Osman, S. M.
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Sultan Qaboos Univ, Dept Phys, Al Khoud, OmanSultan Qaboos Univ, Dept Phys, Al Khoud, Oman