Bott Periodicity for $${\mathbb{Z}_2}$$Z2 Symmetric Ground States of Gapped Free-Fermion Systems
Bott Periodicity for $${\mathbb{Z}_2}$$Z2 Symmetric Ground States of Gapped Free-Fermion Systems
复制标题
有隙自由费米子系统 $${mathbb{Z}_2}$$Z2 对称基态的 Bott 周期
DOI:
10.1007/s00220-015-2512-8
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发表时间:
2016
影响因子:
2.4
通讯作者:
M.R. Zirnbauer
中科院分区:
文献类型:
--
作者:
R. Kennedy;M.R. Zirnbauer
Building on the symmetry classification of disordered fermions, we give a proof of the proposal by Kitaev, and others, for a “Bott clock” topological classification of free-fermion ground states of gapped systems with symmetries. Our approach differs from previous ones in that (i) we work in the standard framework of Hermitian quantum mechanics over the complex numbers, (ii) we directly formulate a mathematical model for ground states rather than spectrally flattened Hamiltonians, and (iii) we use homotopy-theoretic tools rather thanK-theory. Key to our proof is a natural transformation that squares to the standard Bott map and relates the ground state of ad-dimensional system in symmetry classsto the ground state of a (d+ 1)-dimensional system in symmetry classs+ 1. This relation gives a new vantage point on topological insulators and superconductors.
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DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
G. Nittis;Kiyonori Gomi
通讯作者:
Kiyonori Gomi
影响因子:
8.6
作者:
Kane, CL;Mele, EJ
通讯作者:
Mele, EJ
影响因子:
3.7
作者:
Kennedy, Ricardo;Guggenheim, Charles
通讯作者:
Guggenheim, Charles
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
Guo Chuan Thiang
通讯作者:
Guo Chuan Thiang
DOI:
--
发表时间:
1969
期刊:
影响因子:
--
作者:
J. Dupont
通讯作者:
J. Dupont