Главная    Ex Libris    Книги    Журналы    Статьи    Серии    Каталог    Wanted    Загрузка    ХудЛит    Справка    Поиск по индексам    Поиск    Форум   
blank
Авторизация

       
blank
Поиск по указателям

blank
blank
blank
Красота
blank
Müller M., Schmid F. — Advanced Computer Simulation Approaches For Soft Matter Sciences
Müller M., Schmid F. — Advanced Computer Simulation Approaches For Soft Matter Sciences



Обсудите книгу на научном форуме



Нашли опечатку?
Выделите ее мышкой и нажмите Ctrl+Enter


Название: Advanced Computer Simulation Approaches For Soft Matter Sciences

Авторы: Müller M., Schmid F.

Аннотация:

We review various methods to investigate the statics and the dynamics of
collective composition fluctuations in dense polymer mixtures within fluctuating-field2 M. Müller · F. Schmid
approaches. The central idea of fluctuating-field theories is to rewrite the partition func￾tion of the interacting multi-chain systems in terms of integrals over auxiliary, often
complex, fields, which are introduced by means of appropriate Hubbard–Stratonovich
transformations. Thermodynamic averages such as the average composition and the
structure factor can be expressed exactly as averages of these fields. We discuss differ￾ent analytical and numerical approaches to studying such a theory: The self-consistent
field approach solves the integrals over the fluctuating fields in saddle-point approxi￾mation. Generalized random phase approximations allow one to incorporate Gaussian
fluctuations around the saddle point. Field theoretical polymer simulations are used to
study the statistical mechanics of the full system with Complex Langevin or Monte Carlo
methods. Unfortunately, they are hampered by the presence of a sign problem. In a dense
system, the latter can be avoided without losing essential physics by invoking a saddle
point approximation for the complex field that couples to the total density. This leads to
the external potential theory. We investigate the conditions under which this approxima￾tion is accurate. Finally, we discuss recent approaches to formulate realistic time evolution
equations for such models. The methods are illustrated by two examples: A study of
the fluctuation-induced formation of a polymeric microemulsion in a polymer-copolymer
mixture and a study of early-stage spinodal decomposition in a binary blend.


Язык: en

Рубрика: Разное/

Статус предметного указателя: Неизвестно

ed2k: ed2k stats

Год издания: 2005

Количество страниц: 224

Добавлена в каталог: 11.06.2017

Операции: Положить на полку | Скопировать ссылку для форума | Скопировать ID
blank
Предметный указатель
blank
Реклама
blank
blank
HR
@Mail.ru
       © Электронная библиотека попечительского совета мехмата МГУ, 2004-2024
Электронная библиотека мехмата МГУ | Valid HTML 4.01! | Valid CSS! О проекте