Deciphering the nonlocal entanglement entropy of fracton topological orders

Deciphering the nonlocal entanglement entropy of fracton topological orders
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破译分形拓扑序的非局部纠缠熵

DOI:
10.1103/physrevb.97.144106
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
Lu, Yuan-Ming
Lu, Yuan-Ming
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shi, Bowen;Lu, Yuan-Ming

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拓扑序的基态浓缩了扩展对象并支持拓扑激励。这种非平凡性质导致了传统拓扑序的非零拓扑纠缠熵。分形拓扑序是一类奇异的模型,超出了TQFT的描述范围。通过对凝聚体和拓扑激励的一些假设,我们导出了非局部纠缠熵的下界(推广)。下界适用于包括常规拓扑阶数在内的阿贝尔稳定器模型以及i型和ii型分数模型,可以用来区分它们。对于分数阶模型,下界表明可以获得与几何相关的值,并且对于某些子系统的选择是广泛的,包括一些对TQFT总是给出零的选择。讨论了局部扰动下下界的稳定性。
The ground states of topological orders condense extended objects and support topological excitations. This nontrivial property leads to nonzero topological entanglement entropyfor conventional topological orders. Fracton topological order is an exotic class of models which is beyond the description of TQFT. With some assumptions about the condensates and the topological excitations, we derive a lower bound of the nonlocal entanglement entropy(a generalization of). The lower bound applies to Abelian stabilizer models including conventional topological orders as well as type-I and type-II fracton models, and it could be used to distinguish them. For fracton models, the lower bound shows thatcould obtain geometry-dependent values, andis extensive for certain choices of subsystems, including some choices which always give zero for TQFT. The stability of the lower bound under local perturbations is discussed.
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