تقرير
Chiral Y junction of quantum spin chains
| العنوان: | Chiral Y junction of quantum spin chains |
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| المؤلفون: | Buccheri, F., Egger, R., Pereira, R. G., Ramos, F. B. |
| المصدر: | Nuclear Physics B 941, 794-837 (2019) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We study a Y junction of spin-1/2 Heisenberg chains with an interaction that breaks both time-reversal and chain exchange symmetries, but not their product nor SU(2) symmetry. The boundary phase diagram features a stable disconnected fixed point at weak coupling and a stable three-channel Kondo fixed point at strong coupling, separated by an unstable chiral fixed point at intermediate coupling. Using non-abelian bosonization and boundary conformal field theory, together with density matrix renormalization group and quantum Monte Carlo simulations, we characterize the signatures of these low-energy fixed points. In particular, we address the boundary entropy, the spin conductance and the temperature dependence of the scalar spin chirality and the magnetic susceptibility at the boundary. Comment: 67 pages, 11 figures; v2: part of the material moved to appendix, duplicated reference removed |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.nuclphysb.2019.03.005 |
| URL الوصول: | http://arxiv.org/abs/1811.06794 |
| رقم الأكسشن: | edsarx.1811.06794 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.nuclphysb.2019.03.005 |
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