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Selective Population of Edge States in a 2D Topological Band System.
Galilo, Bogdan; Lee, Derek K K; Barnett, Ryan.
Afiliación
  • Galilo B; Department of Mathematics, Imperial College London, London SW7 2AZ, United Kingdom.
  • Lee DK; Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom.
  • Barnett R; Department of Mathematics, Imperial College London, London SW7 2AZ, United Kingdom.
Phys Rev Lett ; 115(24): 245302, 2015 Dec 11.
Article en En | MEDLINE | ID: mdl-26705639
We consider a system of interacting spin-one atoms in a hexagonal lattice under the presence of a synthetic gauge field. Quenching the quadratic Zeeman field is shown to lead to a dynamical instability of the edge modes. This, in turn, leads to a spin current along the boundary of the system which grows exponentially fast in time following the quench. Tuning the magnitude of the quench can be used to selectively populate edge modes of different momenta. Implications of the intrinsic symmetries of the Hamiltonian on the dynamics are discussed. The results hold for atoms with both antiferromagnetic and ferromagnetic interactions.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2015 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2015 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos