کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
979685 | 1645122 | 2006 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Noise-driven nonlinear sigma model
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Noise-driven nonlinear sigma model Noise-driven nonlinear sigma model](/preview/png/979685.png)
چکیده انگلیسی
We present a noise-driven model for obtaining the gap and line-width as functions of the temperature in the nonlinear sigma model. The method is phenomenological and rests on the following physical idea: a classical external stochastic field is introduced representing the coupling of the sigma field with a noise source. Moreover, we assume that the inelastic scattering length is much longer than the elastic one, justifying the neglect of dissipation for temperatures such that the nonlinear sigma model is a good approximation for antiferromagnetic spin chains. This phenomenological approach is justified by comparison with other theoretical predictions and with experiment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 370, Issue 2, 15 October 2006, Pages 601–612
Journal: Physica A: Statistical Mechanics and its Applications - Volume 370, Issue 2, 15 October 2006, Pages 601–612
نویسندگان
M. Malard Sales, A.S.T. Pires, Ronald Dickman, M.C. Nemes,