24 مهر 1400

محمد محمدی

مرتبه علمی:
نشانی: دانشکده علوم و فناوری نانو و زیستی - گروه فیزیک
تحصیلات: فیزیک
تلفن:
دانشکده: دانشکده علوم و فناوری نانو و زیستی

مشخصات پژوهش

عنوان برخوردهاي كينك-پادكينك در مدل 4 دوره اي
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
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مجله Communications in Nonlinear Science and Numerical Simulation
شناسه DOI
پژوهشگران محمد محمدی (نفر اول) ، ریحانه دهقانی (نفر دوم)

چکیده

We borrow the form of potential of the well-known kink-bearing $\varphi^4$ system in the range between its two vacua and paste it repeatedly into the other ranges to introduce the periodic $\varphi^4$ system. The paper is devoted to providing a comparative numerical study of the properties of the two systems. Although the two systems are quite similar for a kink (antikink) solution, they usually exhibit different behaviors throughout collisions. For instance, they have different critical velocities, different results during collisions, and a different rule in their quasi-fractal structures. Their quasi-fractal structures will be studied in the disturbed kink-antikink collisions as well. Hence, three types of scattering windows will be introduced with respect to the incoming speed, the amplitude, and initial phase of the internal mode, respectively. Moreover, a detailed comparative study of the collisions between two kinks and one antikink will be done at the end.