Density field theory to study association in a Yukawa fluid. Role of the fluctuations
In this paper we study the effect of the interaction potential in a liquid where there is an equilibrium of association of a molecule into dimers. We use a field theory where the fields represent the densities of the species and of its dimer. The Hamiltonian is a generalization to binary mixtures...
Збережено в:
Видавець: | Інститут фізики конденсованих систем НАН України |
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Дата: | 2003 |
Автори: | , , |
Формат: | Стаття |
Мова: | English |
Опубліковано: |
Інститут фізики конденсованих систем НАН України
2003
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Назва видання: | Condensed Matter Physics |
Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120768 |
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Цитувати: | Density field theory to study association in a Yukawa fluid. Role of the fluctuations / D. di Caprio, M.F. Holovko, J.P. Badiali // Condensed Matter Physics. — 2003. — Т. 6, № 4(36). — С. 693-702. — Бібліогр.: 11 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of UkraineРезюме: | In this paper we study the effect of the interaction potential in a liquid where
there is an equilibrium of association of a molecule into dimers. We use a
field theory where the fields represent the densities of the species and
of its dimer. The Hamiltonian is a generalization to binary mixtures of the
Hamiltonian studied in the previous work for a one component liquid interacting
with a Yukawa potential. In the binary mixture, the dimerization
equilibrium is taken into account as a condition on the chemical potential
of the monomers and dimers. In this paper we compare the effect of the interaction
potentials on the equilibrium densities as predicted by the mean
field approximation to their effect as a consequence of the fluctuations. The
fluctuations play an important role in the field theoretical analysis. To obtain
the effect of the fluctuations, we have used a relation equivalent to the
‘equation of motion’ in the field theory for the interacting quantum particles.
We find that in a number of physical cases the mean field analysis
can be entirely modified by the effect of the potential in relation with the
fluctuations. |
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