An Index Theorem for Quarter-Plane Toeplitz Operators via Extended Symbols and Gapped Invariants Related to Corner States
An Index Theorem for Quarter-Plane Toeplitz Operators via Extended Symbols and Gapped Invariants Related to Corner States
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基于扩展符号和与角状态相关的有间隙不变量的四分之一平面托普利茨算子的指数定理
DOI:
10.1007/s00220-022-04600-w
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发表时间:
2022
影响因子:
2.4
通讯作者:
Hayashi Shin
中科院分区:
文献类型:
--
作者:
Shintaro Akamine;Atsufumi Honda;Masaaki Umehara;Kotaro Yamada;Taiki Shibata;Hayashi Shin
In this paper, we discuss index theory for Toeplitz operators on a discrete quarter-plane of two-variable rational matrix function symbols. By using Gohberg–Kreĭn theory for matrix factorizations, we extend the symbols defined originally on a two-dimensional torus to some three-dimensional sphere and derive a formula to express their Fredholm indices through extended symbols. Variants for families of (self-adjoint) Fredholm quarter-plane Toeplitz operators and those preserving real structures are also included. For some bulk-edge gapped single-particle Hamiltonians of finite hopping range on a discrete lattice with a codimension-two right angle corner, topological invariants related to corner states are provided through extensions of bulk Hamiltonians.
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DOI:
10.1070/im1977v011n05abeh001759
发表时间:
1977
期刊:
Mathematics of The Ussr-izvestiya
影响因子:
--
作者:
R. V. Dudučava
通讯作者:
R. V. Dudučava
影响因子:
4.5
作者:
K. Clancey;I. Gohberg
通讯作者:
K. Clancey;I. Gohberg
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
本田啓人;永田拓実;市川修平;藤原康文;正直花奈子;三宅秀人;上向井正裕;谷川智之;片山竜二
通讯作者:
片山竜二
DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
R. G. Douglasp;R. Howe;R. G. Douglas;July
通讯作者:
July
影响因子:
2.5
作者:
L. Coburn;R. Douglas;I. Singer
通讯作者:
I. Singer