Edge states: topological insulators, superconductors and QCD chiral bags

被引：19

作者：

Asorey, M. ^{[1
]}

Balachandran, A. P. ^{[2
,3
]}

Perez-Pardo, J. M. ^{[4
]}

机构：

[1] Univ Zaragoza, Dept Fis Teor, C Pedro Cerbuna S-N, E-50009 Zaragoza, Spain

[2] Syracuse Univ, Phys Dept, Syracuse, NY 13244 USA

[3] Univ Fed Rio Grande do Norte, Inst Int Fis, Av Odilon Gomes de Lima 1722, BR-59078400 Natal, RN, Brazil

[4] Univ Carlos III Madrid, Dept Matemat, Avda Univ 30, Madrid 28911, Spain

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2013年 / 12期

关键词：

Boundary Quantum Field Theory; Discrete and Finite Symmetries; Field Theories in Lower Dimensions;

D O I：

10.1007/JHEP12(2013)073

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The dynamics of the magnetic field in a superconducting phase is described by an effective massive bosonic field theory. If the superconductor is confined in a domain M with boundary. M, the boundary conditions of the electromagnetic fields are predetermined by physics. They are time-reversal and also parity invariant for adapted geometry. They lead to edge excitations while in comparison, the bulk energies have a large gap. A similar phenomenon occurs for topological insulators where appropriate boundary conditions for the Dirac Hamiltonian also lead to similar edge states and an "incompressible bulk". They give spin-momentum locking as well. In addition time-reversal and parity invariance emerge for adapted geometry. Similar edge states appear in QCD bag models with chiral boundary conditions.

引用

页数：26

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