Finite-size criteria for spectral gaps in ?-dimensional quantum spin systems
Finite-size criteria for spectral gaps in
?-dimensional quantum spin systems
复制标题
? 维量子自旋系统中光谱间隙的有限尺寸标准
DOI:
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发表时间:
2019
期刊:
影响因子:
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通讯作者:
M. Lemm
中科院分区:
文献类型:
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作者:
M. Lemm
We generalize the existing finite-size criteria for spectral gaps of frustration-free spin systems to $D>2$ dimensions. We obtain a local gap threshold of $\frac{3}{n}$, independent of $D$, for nearest-neighbor interactions. The $\frac{1}{n}$ scaling persists for arbitrary finite-range interactions in $\mathbb Z^3$. The key observation is that there is more flexibility in Knabe's combinatorial approach if one employs the operator Cauchy-Schwarz inequality.
影响因子:
1.3
作者:
M. Lemm;E. Mozgunov
通讯作者:
M. Lemm;E. Mozgunov