کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
976682 933147 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Separation of particles in time-dependent focusing billiards
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Separation of particles in time-dependent focusing billiards
چکیده انگلیسی
We consider a family of stadium-like billiards with time-dependent boundaries. Two different cases of time dependence are studied: (i) the fixed boundary approximation and (ii) the exact model which takes into account the motion of the boundary. It is shown that when the billiards possess strong chaotic properties, the sequence of their boundary perturbations is the Fermi acceleration phenomenon which is three times larger than in the case of the fixed boundary approximation. However, weak mixing in such billiards leads to particle separation. Depending on the initial velocity three different things occur: (i) the particle ensemble may accelerate; (ii) the average velocity may stay constant or (iii) it may even decrease.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 389, Issue 23, 1 December 2010, Pages 5408-5415
نویسندگان
, , ,