arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.08102cond-mat.str-elcond-mat.stat-mechhep-thquant-ph
收藏

具有阻挫边界条件的XY链中缺陷的影响

Effects of defects in the XY chain with frustrated boundary conditions

Gianpaolo Torre, Vanja Marić, Fabio Franchini, Salvatore Marco Giampaolo

摘要:

最近已经证明,由于受抑边界条件,即具有奇数个晶格位置和反铁磁相互作用的周期性边界条件,可以随之产生新类型的体、局部有序。对于在零外场的量子XY链,通常的反铁磁秩序已被发现被取代的介观铁磁体或由不相称的AFM秩序。在这项工作中,我们研究的弹性,这些新类型的订单对一个缺陷,打破了平移对称的模型。我们发现,而铁磁缺陷恢复传统的,交错的顺序,AFM一个稳定的无公度秩序。受挫阶对某些缺陷的鲁棒性为其实验可观测性铺平了道路。

英文摘要:

It has been recently proven that new types of bulk, local order can ensue due to frustrated boundary condition, that is, periodic boundary conditions with an odd number of lattice sites and anti-ferromagnetic interactions. For the quantum XY chain in zero external fields, the usual antiferromagnetic order has been found to be replaced either by a mesoscopic ferromagnet or by an incommensurate AFM order. In this work we examine the resilience of these new types of orders against a defect that breaks the translational symmetry of the model. We find that, while a ferromagnetic defect restores the traditional, staggered order, an AFM one stabilizes the incommensurate order. The robustness of the frustrated order to certain kinds of defects paves the way for its experimental observability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑