کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8162806 1525212 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Internal parity symmetry and degeneracy of Bethe Ansatz strings in the isotropic heptagonal magnetic ring
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Internal parity symmetry and degeneracy of Bethe Ansatz strings in the isotropic heptagonal magnetic ring
چکیده انگلیسی
The exact Bethe eigenfunctions for the heptagonal ring within the isotropic XXX model exhibit a doubly degenerated energy level in the three-deviation sector at the centre of the Brillouin zone. We demonstrate an explicit construction of these eigenfunctions by use of algebraic Bethe Ansatz, and point out a relation of degeneracy to parity conservation, applied to the configuration of strings for these eigenfunctions. Namely, the internal structure of the eigenfunctions (the 2-string and the 1-string, with opposite quasimomenta) admits generation of two mutually orthogonal eigenfunctions due to the fact that the strings which differ by their length are distinguishable objects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 434, 1 February 2014, Pages 14-20
نویسندگان
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