arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1811.09899math-phmath.MP
收藏

一般图上高自旋XXZ系统的薛定谔算子方法

A Schrödinger Operator Approach to Higher Spin XXZ Systems on General Graphs

Christoph Fischbacher

摘要:

我们考虑一般图$\mathcal{G}$上的自旋$J$ XXZ-哈密尔顿算子,并证明了它等价于我们称之为“具有最大局部占有数$M$的$N$ -粒子图“上的离散多粒子薛定谔型算子的直和,其中动力学项由加权拉普拉斯算子描述。推广以前的结果的自旋$1/2$的情况下,我们给出了充分条件的存在的光谱间隙以上的低洼液滴带时,底层图$\mathcal{G}$是(i)链和(ii)带宽度$L$。

英文摘要:

We consider the spin-$J$ XXZ-Hamiltonian on general graphs $\mathcal{G}$ and show its equivalence to a direct sum of discrete many-particle Schrödinger type operators on what we call "$N$-particle graphs with maximal local occupation number $M$", where the kinetic term is described by a weighted Laplacian. Generalizing previous results for the spin-$1/2$ case, we give sufficient conditions for the existence of spectral gaps above the low-lying droplet band when the underlying graph $\mathcal{G}$ is (i) the chain and (ii) a strip of width $L$.

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。

↑