کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
979623 933376 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A note on the high temperature expansion of the density matrix for the isotropic Heisenberg chain
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
A note on the high temperature expansion of the density matrix for the isotropic Heisenberg chain
چکیده انگلیسی
Göhmann, Klümper and Seel derived the multiple integral formula of the density matrix of the XXZ Heisenberg chain at finite temperatures. We have applied the high temperature expansion (HTE) method to isotropic case of their formula in a finite magnetic field and obtained coefficients for several short-range correlation functions. For example, we have succeeded to obtain the coefficients of the HTE of the third neighbor correlation function 〈σjzσj+3z〉 for zero magnetic field up to the order of 25. These results expand our previous results on the emptiness formation probability [Z. Tsuboi, M. Shiroishi, J. Phys. A: Math. Gen. 38 (2005) L363-L370, condmat/0502569.] to more general correlation functions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 377, Issue 1, 1 April 2007, Pages 95-101
نویسندگان
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